液压件是煤矿液压支架的重要部件， 系统的各项动作主要靠液压油缸来完成。

The hydraulic cylinders are critical components of mine bracket-mounted crane, almost all the movements of the crane are carried out by the hydraulic cylinders.

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通过对集贤煤矿地质概况进行分析，决定采用倒牵式回撤综采液压支架。

By analyzing the geological situation of Jixian Coal Mine, the inverted-led withdrawing way of fully mechanized mining hydraulic supports is applied.

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介绍了一种适应于煤矿井下液压支架使用的高压、大流量、操作力矩小的先导式平面截止阀，并详细介绍了其工作原理、结构和使用性能特点。

A cut-off plane valve applicable for the hydraulic shield in the coal mine is introduced, which has the feature of high pressure, large flux and small handling moment.

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