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为了适应竖井掘进发展的需要,1974年8—11月,由济南重型机械厂、锦州矿山机械厂、泰安煤矿机械厂联合完成了25吨凿井绞车的设计。1975年,分别由济南重机厂、锦州矿机厂各试制两台。76年9月对由锦州矿机厂试制的在铁法矿务局进行工业性试验的两台进行了初步鉴定。济南重机厂试制的两台正在山东
In order to meet the needs of shaft excavation and development, from August to November 1974, the design of a 25-ton sinking winch was jointly completed by Jinan Heavy Machinery Plant, Jinzhou Mining Machinery Plant and Taian Coal Mine Machinery Plant. In 1975, respectively, by the Jinan Heavy Machinery Plant, Jinzhou mine factory trial two. In September 76, preliminary test was carried out on two sets of industrial tests conducted by Tiefa Mining Bureau piloted by Jinzhou Mine Machine Factory. Jinan Heavy Machinery Factory trial two are in Shandong