n. gadder
misc. drill mounting
... central mounting 中央悬挂 drill mounting 钻机架 mounting rack 安装架,安装支柱...
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... gadder 钻机架;创煤镐 gadder 钻机架；创煤镐 gadding 穿孔 ...
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钻机最明显的部分是机架，因此提举一节一节的钢管。
It is used to lift sections of pipe, which are lowered into the hole made by the drill.
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