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北京长安煤矿自动化工程集团生产的ＫＪ４系统简介ＫＪ４煤矿安全生产监测系统是在原煤炭部技术发展司和原航空工业部科技局直接领导下的“七五”国家重点科技攻关项目。于１９８６年１０月通过两部的联合鉴定。ＫＪ４系统以它的先进性、可靠性、实用性、经济性，赢得了广...
Brief introduction of KJ4 system produced by Beijing Changan Coal Mine Automation Engineering Group KJ4 mine safety production monitoring system is the key national key scientific and technological project of the “Seventh Five-year Plan” under the direct leadership of the Ministry of Science and Technology of the former Ministry of Coal Industry and the Bureau of Science and Technology of the former Ministry of Aviation Industry. In October 1986 through the two joint identification. KJ4 system with its advanced, reliability, practicality, economy, won wide ...