The shortcomings existing in electrical control system in preliminary mine hoist are analyzed, and the application and effectiveness of PC in hoisting shaft are summarized.

分析了原矿井提升机电控系统存在的缺陷并阐述可编程序控制器（ PC）在矿用提升机中的应用及效果。

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The circular tube belt conveyor is a new method for hoisting coal in a vertical shaft.

圆管胶带输送机是竖井提升煤炭的一种新方法。

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The hoisting and transport systems of its main shaft are reformed in 2005.

2005年该矿对主井提升及运输系统进行了技术改造。

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In 1992, a team bankrolled by Tennessee businessman Roy Shoffner and led by Bob Cardin excavated the plane by using hot water to melt a shaft into the ice, hoisting the plane out piece by piece.

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