A new type of signaling device for mine hoists is introduced here.
介绍了一种新型的矿井提升机信号装置。
This text regards the security of the gates and hoists as the research object.
本文把闸门与启闭机的安全性作为研究对象。
Heavy Lift Equipment, Hoists, Rail tracks-overhead.
重型提升设备，起重葫芦，高架轨道。
Heavy Lift Equipment, Hoists, Rail tracks-overhead.
重型提升设备，起重葫芦，高架轨道。
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