1Heavy Driving Drum FEG of Belt-conveyorGUO Zhi-guo, LI Yun-hai, JIANG Wei-liangDesign and Research1-3,62A New Type Advance Timbering Support Set for Air-return GateSONG De-junDesign and Research4-63An Analysis of Mechanics for Tri-eccentric Butterfly ValveWU JianDesign and Research7-9,124Design of Lithium Hydronium Battery Charge in Common UseZHU Xuan, OUYANG Ming-sanDesign and Research10-125Study of Test Loading System with Hydraulic Dynamometer for Cutting GearheadTAO ZhengDesign and Research13-156The Design of Foam Drilling and Truck DrillerYAN Nan-fei, FENG Da-huiDesign and Research16-187The Characteristic Analysis of V-Roller On Mid-frequency Quenching Tool MachineMAO Jun, XIE Miao, LIU Ji-quanDesign and Research18-208Study on Fault Judgment and Protection of Single-end Power Supply Main Line Based on Wavelet TransformationWANG Tuo, ZOU You-ming, DU Sheng-hua, JIANG Jun, WANG Jun-meiDesign and Research21-22,259Design and Test of Controllable SERVO for Speed Regulating Hydraulic CouplerHAN Dong-jinDesign and Research23-2510A Study of Information Integration System of Colliery Electromechanical EquipmentZHANG Yin, SHI Li-ping, ZHANG Guang-longDesign and Research26-2911The Identification of Rotational Speed of Asynchronous Motor Based on Dynamic Recursion NetworkXU Jian-hua, NING Yong, ZHAO Yu-mingDesign and Research29-3112Discussion on Some Terms of Drum ShearersZHOU Yong-changIssue Discussion32-3513Redundant Detecting Method of Feedback Signal in Hoist Digital Control SystemHE Xiao-qun, HE Feng-you, LU Xing-xianIssue Discussion36-3714The Application of Check Valve and Pilot-operated Check Valve to Make-up CircuitZHANG JunIssue Discussion38-39,4215The Application of SFC in Manipulator ControlXIONG Yong-chao, QI Chuan-gang, PU Zhi-xinIssue Discussion40-4216The Demarcation of Installation Reference Line for Belt ConveyorZHANG Hong-jun, CHENG Zheng, ZHANG Yu-xin, SUN Zhi-weiIssue Discussion43-44,4717A Study on Higher-level Leakage Testing in Leakage Protection for Mine Vacuum Feed SwitchJING Hai-yun, JIANG Xi-yanIssue Discussion45-4718Discussion on Oscillating Load of Rolling BearingXUE PingIssue Discussion48-4919A Simulation Study of Shovel Actuating ArmZHANG Guang-lei, CHEN Mei-yun, GONG Pi-fengIssue Discussion50-5120Automatic Testing and Mixing System of EmulsionWANG Xiao-liIssue Discussion52-53 