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我国70年代以前投产的矿井，提升机大部分属于老一代产品，不但在安全、技术性能和提升能力等诸多方面满足不了现代矿井正常生产的需要，而且设备运行的时间长，部分设备已到报废年限。为了安全生产，对于老矿井来说都面临着更新换代的问题。但如按常规更换标准系列提升机，正?
Most of the mines and hoists put into operation before the 1970s belong to the older generation. They not only can not meet the needs of normal production in modern mines in many aspects such as safety, technical performance and upgrading ability, but also the equipment runs for a long time and some of the equipment has been scrapped Years. For safe production, the old mines are faced with the problem of replacement. However, if the standard series of hoist replacement, is?