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pitprop

n. a wooden prop used to support the roof of a mine

同义词： sprag

1、坑木

...pitpat 心跳声pitprop 坑木pitsaw 大锯 ...

2、矿用支柱

... pitprop矿用支柱 pitquarry地下运输露天矿 pitrunrock采石场原岩 ...

3、临时坑木柱

...坑木浸渍 timber treatment临时坑木柱 pitprop下坑木隔间 timber compartment ...

pitprop bracket坑木支架

n.a wooden prop used to support the roof of a mine

同义词：sprag

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