1Technology of Energy-saving Constant Torque Stepless Speed Control by Bi-motorHE Wen-lin, FU Zhou-xing1-32A New Whole-digital Electric Control Device for Mine DC WinderTAN Guo-jun, XIONG Shu4-63Experimental Study of Obliquity Effect of Rear Plate on Erosion in Centrifugal FanZHU Hong-lei, LI Yi-min, SUN Geng-sheng, JIA Li-hong7-8,114The Design of Slurry Pipeline Conveying SystemZHANG Dong-mei, HUANG Dong9-115Determination of Modification Coefficient of Idle Gear in Ordinary Gear TrainRAN Tao12-14,186The Vector Control of Asynchronous Motor Based on Single Neuron ControllerFENG Ai-wei, FU Hua, WANG Chuan-ying, MENG Xian-jing15-187Application of Modern Control Theory in Automatic Drainage SystemLI Rui, KOU Zi-ming, LI Ze-song, ZHANG Ren-qi19-218The Design of Coal Electric Drill Switch TesterCHEN Hong-fei, XIA Wen-gang, WANG Cai-yan, GE Bao-hua21-239Selective Leakage Protective System Based on Zero Sequence Power DirectionWANG Yan-wen, WANG Nian-bin, YANG Xiu-qiang, XING Qiang24-26,3010Research on Vector Control System for Dual-PWM AC Asynchronous MotorZHANG Yan, ZHANG Tong-zhuang27-3011Finite Element Analysis for Spandrel Frame of Head Part Used on Belt ConveyorWANG Xing-ru, ZHU Wei-ping, ZHOU Xiang-tuan31-3212The Energy Saving Study of Emulsion PumpMENG De-yuan, DU Chang-long33-3413Technical Characters and Structural Features of Some Foreign Shearers and Continuous MinerXIAO Rui-ling, LI Xue-lei, LIAN Xiang-dong35-37,4014Discuss of Protective Performance Reliability of BKDZ Mining Flameproof Vacuum Feed SwitchWANG Li, XIA Xin-cheng38-4015Automatic Electric Dispatch System of Coal EnterpriseZHOU Chuan-xian41-4316The Research of Management System Pre-controlling Violation of Power Supply EnterpriseDAI Qing-hui, SONG Wei-xia43-4517A New Fault Monitoring and Measuring Device for Power Supply System in Coal MineXI Chuan-feng46-4718A Simple Determination of Gas Concentration under Various PressuresZHANG Hui-zhan, SU Jian-xin48-5019Researches on the Equipment for Quick Changing Head Ropes of Multi- Rope Friction WinderBAI Hong-feng, HU Pan51-52,5520Detecting Technology of Lead-acid Battery for TractionPENG Xiao-song53-55 