1Microcomputer Parallel Monitoring and Control System for Coal Mine Main FanQi Xueguang, Xu Kebao, Yan Xianghong, Yang Fenzhong, Wang GonghuaScientific and Research Achievements1-32Centralized and Decentralized On-line Monitoring System for Low Volt Electricity Network InsulationWang Minquan, Li Weihong, Yu LiangScientific and Research Achievements4-53Expertise and Decision Support System for Coal Roadway Bolting DesignMeng Xiangrui, Shu HangLab Research6-74Parameters Self-adaptive Fuzzy Control System for Coal Mine Water SupplyFu HuaLab Research8-105Study and Application of Wireless Computer NetworkLab Research11-126Microcomputer Management System for Time-sharing Metering of Electricity Energy of Coal Mine Main SubstationLab Research13-157Intelligent Priority TechnologyLab Research15-168Study in Class 1 Intelligent ControllerLab Research17-199Multimedia Computer Network System in Yaoqiao Coal MineQian Jiansheng, Su Jun, Shen Rong, Liu Fuqiang, Li Xinbao, Feng Xuewu, Huang JianpingTechnical Progress20-2210Study and Application of Varied Frequency Speed Regulating for Boiler Air InductionTechnical Progress22-2311Cirucit Design of Capacitance Sensor for Related Flow Meter of Practical TypeTechnical Progress24-2512Design of a Simplified Switch Power SupplyTechnical Progress26-2813Application of PLC in Intermediate Frequency Induction Heating EquipmentTong JunTechnical Exchange29-3014Key Technology and Products of KJ28 Optic-fiber Industrical TV SystemTechnical Exchange31-3215Testing of Steel Wire Cage Guide Tension and its Rigid ParametersTechnical Exchange33-3416In Causes and Troubleshooting of Automatic Talk Interruption Failure for Program-controlled ExchangeTechnical Exchange34-3517Discussions in Choosing Main Shaft Hoisting Equipment for Chensilou MineTechnical Exchange35-3718Discussions in Value Assuming "Demand Factor" in Underground Mining Area Power Supply DesignTechnical Exchange37-3819Discussions in Safety Braking System for Mobile Substation Haulage in Coal Mining FacesAuxiliary Haulage Modernization39-4020Options in Heating for Cold Drawn Tube Heat TreatmentAuxiliary Haulage Modernization41-42 