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International Journal of Advanced Technology in Mechanical, Mechatronics and Materials最新文献

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Strength Analysis of the Frame Structure with the Impact Load Between the ASTM A36 And JIS G3101 Materials in the Electric Car E-Falco ASTM A36与JIS G3101冲击载荷下电动汽车E-Falco车架结构强度分析
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2022-04-30 DOI: 10.37869/ijatec.v3i1.54
H. Pranoto, Bambang Darmono, Gama Widyaputra
{"title":"Strength Analysis of the Frame Structure with the Impact Load Between the ASTM A36 And JIS G3101 Materials in the Electric Car E-Falco","authors":"H. Pranoto, Bambang Darmono, Gama Widyaputra","doi":"10.37869/ijatec.v3i1.54","DOIUrl":"https://doi.org/10.37869/ijatec.v3i1.54","url":null,"abstract":"Designing a vehicle frame, selecting materials and determining the factors of safety and comfort are a very important thing very important. So that the safety of the driver is a concern important when the car has an accident. Research methods used is a simulation using the method finite element. Impact testing modeling mechanism that done is full-width frontal impact. This crash test variation was carried out on the frame structure of the E – Falco electric car. The research compares the two materials to be applied to the frame namely ASTM A36 and JIS G3101 materials. Variation of speed applied to the impact testing of this research is 40 km/hour, 60 km/hour, and 100 km/hour. After the analysis process is carried out, obtained the maximum deformation of the frame on the ASTM A36 material with a speed of 100 km/h is 176.57 mm and at JIS G3101 material is 175.09 mm. The maximum stress value obtained in a frame with ASTM A36 material with a speed of 100 km/hour is 4488 MPa and the JIS material G3101 is 4475 MPa. The maximum strain value obtained frame with ASTM A36 material with a speed of 100 km/hour is 2.46E-02 and the JIS G3101 material is 2.52E-02. The frame with ASTM A36 material has a safety factor of 2.4 and the JIS material G3101 has a safety factor of 3.1.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132398707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Power Production and Drag of Autorotating Cross Cylinder Turbine Models 自旋交叉缸涡轮模型的产功率和阻力
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2022-04-30 DOI: 10.37869/ijatec.v3i1.52
R. Wulandana, D. Foote, S. Pearl, Nataniel Ilyayev
{"title":"Power Production and Drag of Autorotating Cross Cylinder Turbine Models","authors":"R. Wulandana, D. Foote, S. Pearl, Nataniel Ilyayev","doi":"10.37869/ijatec.v3i1.52","DOIUrl":"https://doi.org/10.37869/ijatec.v3i1.52","url":null,"abstract":"The autorotation phenomena of bladeless symmetric objects exposed to fluid flow have promised power generation from the kinetic energy of natural water and air currents. Our past experiments on bladeless turbine models suggest non-linear correlation between the flow speed and power production.  This report explores factors such as flow obstacles and turbine’s position that may affect the power generation of such turbines at Reynolds numbers around 10,000 to 50,000. Using a custom-made water flow tank, we tested the power production and generated drag forces of 3D-printed bladeless turbine models under various conditions of flow. Results indicate the significant effect of flow straightener and flow perturbation to the power production.  Additionally, the effects of turbine infill density and flow speed on the generated drag and measured rotation-per-minute (rpm) are reported. The minimal effects from the turbine’s weight and position in the water flow on the power production require further exploration","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130481868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance Analysis of DN1750 and DN1800 Electric Submersible Pump for Production Optimization on the Oil Well DN1750和DN1800电潜泵在油井优化生产中的性能分析
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2022-04-30 DOI: 10.37869/ijatec.v3i1.55
A. W. Biantoro, Bambang Darmono, H. Pranoto
{"title":"Performance Analysis of DN1750 and DN1800 Electric Submersible Pump for Production Optimization on the Oil Well","authors":"A. W. Biantoro, Bambang Darmono, H. Pranoto","doi":"10.37869/ijatec.v3i1.55","DOIUrl":"https://doi.org/10.37869/ijatec.v3i1.55","url":null,"abstract":"Abstract. Electric Submersible Pump (ESP) is an artificial lift method to lift fluid from the reservoir to the surface with a certain production rate, the ability of the pump to lift a certain fluid to the surface is adjusted to the capacity of the well itself. Over time, the production of oil wells will experience a decrease in the rate of production which will cause a decrease in pump performance. In several oil wells, well maintenance activities have been carried out. Therefore, in this study, an analysis of pump performance and optimization of the ESP pump was carried out using the Nodal Variable Speed Drive analysis method. The goal is to determine the production capacity of the oil well and determine the pump speed as desired. Oil well performance analysis and optimization of the ESP pump were carried out by mathematical calculations with the optimization results obtained that the DN1750 pump was installed at a frequency of 50 Hz, 55 Hz, 60 Hz, 65 Hz, and 70 Hz. The Hz number does not cross the desired flow rate line (q optimum) or is outside the desired fluid flow rate range by the oil well so it can be interpreted that based on the observation of the optimization process, the condition of the DN1750 pump is not working optimally so that the oil production capacity is not optimal. The DN 1800 pump at a frequency of 55 Hz with a speed of 3300 rpm is in accordance with the production capabilities of oil wells so that the appropriate pump is obtained and is expected to work at optimum conditions. At a frequency of 55 Hz with a speed of 3300 rpm successfully cut the desired flow rate line (q optimum) from the observed oil well characteristics or is in the range of fluid flow rates desired by the oil well, which is 1936,698 Barrels Per Day (BPD) with wellbore pressure (PWF) 629 psi. ","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129783194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Archimedes Screw Turbines (ASTs) Performance Analysis using CFD Software Based on Variation of Blades Distance and Thread Number on The Pico Hydro Powerplant 基于叶片距离和螺纹数变化的阿基米德螺杆式水轮机性能CFD分析
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2022-04-30 DOI: 10.37869/ijatec.v3i1.53
Bambang Darmono, H. Pranoto
{"title":"Archimedes Screw Turbines (ASTs) Performance Analysis using CFD Software Based on Variation of Blades Distance and Thread Number on The Pico Hydro Powerplant","authors":"Bambang Darmono, H. Pranoto","doi":"10.37869/ijatec.v3i1.53","DOIUrl":"https://doi.org/10.37869/ijatec.v3i1.53","url":null,"abstract":"Pico hydro is a power plant that uses water as turbine propulsion that can generate electricity by a generator. This research will discuss the numerical analysis of the effect of the number of threads on the turbine blades. The analysis process uses the Computational Fluid Dynamic method and the software used in ANSYS FLUENT. In variation 1 uses 9 threaded blades, variation 2 uses 6 threads, variation 3 uses 4 threads. Based on the simulation results in variation 1 with the number of blades 9 threads, the highest torque at TSR 12 is 0.00984111 Nm, power is 0.007671419 Watt. The water pressure entering the turbine blades in variation 1 is 0.097098 Pascal and the water pressure coming out of the blades is 0.047954 Pascal, there is a total pressure drop of 0.4914 Pascal. Based on the torque and power values of the Archimedes turbine in the three variations, it is known that variation 1 has the best performance followed by the other two turbine variations.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121769138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Development of Fine Surface Roughness of FeCrAl Substrate by Gamma Alumina Coating Material Through Nickel Oxide Catalyst 利用氧化镍催化剂制备γ -氧化铝涂层材料制备高表面粗糙度的FeCrAl衬底
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-11-18 DOI: 10.37869/ijatec.v2i2.46
D. Feriyanto, S. S. Abdulmalik, H. Pranoto, Supaat Zakaria
{"title":"The Development of Fine Surface Roughness of FeCrAl Substrate by Gamma Alumina Coating Material Through Nickel Oxide Catalyst","authors":"D. Feriyanto, S. S. Abdulmalik, H. Pranoto, Supaat Zakaria","doi":"10.37869/ijatec.v2i2.46","DOIUrl":"https://doi.org/10.37869/ijatec.v2i2.46","url":null,"abstract":"The most commonly used method for protecting atmospherically exposed steel against corrosion, is the application of protective organic coating systems. It is widely recognized that the stability of the coating-substrate interface is related to the interfacial adhesion forces and electrochemical properties of this region. This study aim to develop fine surface roughness by ultrasonic and electroplating coating methods that applied for FeCrAl catalytic converter. This method consists of thwo methods which are ultrasonic bath that carried out by frequency of 35 kHz and various ultrasonic times of 1, 1.5, 2, 2.5 and 3 hours is imposed and the electroplating was conducted for several variation times of 15, 30, 45, 60 and 75 minutes, current density of 8 A/dm2. The result shows that the surface roughness of UB samples in between 0.11 to 0.21 µm, UBdEL samples of 0.81 to 2.17 µm, UB+EL samples of 0.64 to 1.63 µm and EL samples of 0.69 to 1.11 µm. The finest surface of each techniques are located at UB 1.5 h, UBdEL 45 minutes, UB 1.5 h+EL 30 minutes and UB 30 minutes. That data is supported by coating thickness of coated FeCrAl substrate where UB samples in between 2 -2.8 µm, UBdEL samples of 4.1 to 5 µm, UB+EL samples of 9.1 to 12 µm and EL samples of 6.2 to 11.3 µm.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124168604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Performance of VoIP Using Routing Open Shortest Path First with Multi-Protocol Label Switching 基于开放最短路径优先和多协议标签交换的VoIP性能研究
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-11-18 DOI: 10.37869/ijatec.v2i2.50
Danang Sunandar, A. Wahab, M. Alaydrus
{"title":"Performance of VoIP Using Routing Open Shortest Path First with Multi-Protocol Label Switching","authors":"Danang Sunandar, A. Wahab, M. Alaydrus","doi":"10.37869/ijatec.v2i2.50","DOIUrl":"https://doi.org/10.37869/ijatec.v2i2.50","url":null,"abstract":"Voice over internet protocol is a communication technology in the world of computer network that can be used for sending voice or video and data transmission over Internet Protocol in real time. VoIP network can be implemented with Asterisk applications as a server to a Private Automatic Branch eXchange applied in a Graphical Network Simulator 3. In this study, VoIP communication using routing OSPF within MPLS will be calculated, the QoS value collected based on impact performance under normal condition and not normal condition (link failure) different varian bandwidth in the network. The results from the simulation show that in normal condition and not normal condition there is average delay value with routing OSPF 4 ms and routing OSPF with MPLS 5 ms, the value of jitter max which same of 6 ms using varian bandwidth from 256 kbps and 512 kbps. All of the QoS parameters, such as delay, jitter and packet loss will be compare to standard ITU-T G.114. This research can be extended with addition of another measurement or another protocol.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125264764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Prototype Aircraft Noise Monitoring System Using Microcontroller 基于单片机的样机飞机噪声监测系统设计
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-11-18 DOI: 10.37869/ijatec.v2i2.49
A. Ridwan, Triyanto Pangaribowo
{"title":"Design of Prototype Aircraft Noise Monitoring System Using Microcontroller","authors":"A. Ridwan, Triyanto Pangaribowo","doi":"10.37869/ijatec.v2i2.49","DOIUrl":"https://doi.org/10.37869/ijatec.v2i2.49","url":null,"abstract":"This paper was presented a design of aircraft noise monitoring system using microcontroller. This system is for monitoring noise levels to make it easier to analyze and measure noise that can be accessed remotely. The measurement results are accessed through a browser with IP address access (Internet Protocol) from the local server esp32 and also OLED 0.96 inc. Taking the noise value for 10 seconds with data samples every 1 second with aircraft noise sources consisting of APU (Auxiliary Power Unit), dual pack on and engine motoring. With each noise value of 61.5 dB, 75.6 dB and 82.5 dB.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"342 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116659219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Wheel Torque Performance Test of the Electric Racing Car Concept E-Falco E-Falco概念电动赛车设计及车轮扭矩性能试验
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-11-18 DOI: 10.37869/ijatec.v2i2.45
H. Pranoto, Bambang Darmonoa, Z. Arifin, I. Susanto
{"title":"Design and Wheel Torque Performance Test of the Electric Racing Car Concept E-Falco","authors":"H. Pranoto, Bambang Darmonoa, Z. Arifin, I. Susanto","doi":"10.37869/ijatec.v2i2.45","DOIUrl":"https://doi.org/10.37869/ijatec.v2i2.45","url":null,"abstract":"To reduce the use of fossil fuels in vehicles and reduce exhaust emissions, it is necessary to use electric vehicle technology. Solidworks software is used in designing and manufacturing an electric car and a simulation is carried out using CFD (Computation Fluid Dynamic) software to determine the strength of the frame structure and air drag when the electric car is running. The performance test of the motor by using the dyno test to determine the acceleration time, power, and torque of the motor. The results of the simulation show that at a speed of 10 km/h the air drag is 6.24 N, a speed of 20 km/h is 24.64 N, and a speed of 40 km/h is 93.92 N. The results of the dyno test shows that the acceleration time with full acceleration from a speed of 0-70 km/h is 13.63 seconds, the maximum power output by the motor is 14.17 hp occurs at a speed of 36-53 km/h and the amount of peak torque released by the motor occurs at a speed of 13 km/h at 228 Nm.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121753743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Torque Analysis of 2 KW BLDC (Brushless Direct Current) Motor with Speed Variations in Electric Cars E-Falco E-Falco电动汽车2 KW无刷直流电机变速转矩分析
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-11-18 DOI: 10.37869/ijatec.v2i2.47
Bambang Darmono, H. Pranoto, Z. Arifin
{"title":"Torque Analysis of 2 KW BLDC (Brushless Direct Current) Motor with Speed Variations in Electric Cars E-Falco","authors":"Bambang Darmono, H. Pranoto, Z. Arifin","doi":"10.37869/ijatec.v2i2.47","DOIUrl":"https://doi.org/10.37869/ijatec.v2i2.47","url":null,"abstract":"The motor releases torque and power to drive an electric car by carrying the load from a start position until it travels at the desired speed. The KMLI E-Falco electric car uses a BLDC type electric motor with a power capacity of 2 kW. To find out the amount of torque of a 2 kW BLDC motor when driving with variations in speed, it can be done by manual calculations using the torque equation and doing a dynotest test. The dynotest results show that the motor torque at the speed: 1 km/h is 1 Nm, 10 km/h is 131 Nm, 13 km/h is 228 Nm, 20 km/h is 225 Nm, 30 km/h is 219 Nm, 40 km / h is 188 Nm, 50 km / hour is 145 Nm, 60 km / h is 113 Nm, and 70 km / h is 85 Nm. From the results of the dynotest, it shows that the peak torque occurs at a speed of 13 km / h at 228 Nm. Racing software installed in the controller can increase the motor torque by four times at a speed variation of 13-70 km/h based on the results of the dynotest above. Keywords: motor, BLDC, torque, speed, acceleration.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123481512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Two Dimensional CFD Analysis and Flow Optimization of Transmission Cooling Scoop for Longitudinal Powertrain Applications 纵向动力系统传动冷却斗的二维CFD分析及流动优化
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Pub Date : 2021-04-19 DOI: 10.37869/IJATEC.V2I1.39
J. Viertel, R. Wulandana
{"title":"Two Dimensional CFD Analysis and Flow Optimization of Transmission Cooling Scoop for Longitudinal Powertrain Applications","authors":"J. Viertel, R. Wulandana","doi":"10.37869/IJATEC.V2I1.39","DOIUrl":"https://doi.org/10.37869/IJATEC.V2I1.39","url":null,"abstract":"Two dimensional finite area method simulation was conducted to optimize the convective cooling performance of a transmission cooling scoop for longitudinal vehicle powertrain applications. Cooling of the transmission in an automobile is important to prevent premature wear or sudden failure caused by prolonged overheating of internal transmission components. The most common method for transmission cooling requires a small energy input for powering a pump to cool the transmission by circulating transmission fluid through a heat exchanger. An alternative cooling method was designed utilizing a simple scoop geometry to induce forced convection from ambient air to cool the transmission with no energy input requirement. Two dimensional simulation of this alternative cooling method was conducted in ANSYS Fluent. Fluid flow and heat transfer performance were analyzed for three proposed cooling scoop designs. Further flow optimization was achieved with parametric study regarding angle at which the cooling scoop is positioned relative to the transmission. Three dimensional simulation was conducted for improved observation of the physical model. Based on the simulation results, optimal geometry and future design improvements have been determined. A peak simulated heat transfer of 11.14 kW/m^2 was achieved with scoop angle of 45 degrees. Future research investigating the effects of induced turbulence to improve convective heat transfer would be beneficial.","PeriodicalId":365201,"journal":{"name":"International Journal of Advanced Technology in Mechanical, Mechatronics and Materials","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127329853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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