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When the water depth or drilling depth is very low, a single platform is enough.
当湖水较浅、钻进深度不深时，选用单体钻探平台。
youdao
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This is a patented single column machine for drilling or for tapping.
这是一台获得专利的单柱机，可以用来钻孔或攻丝。
youdao
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This is a patented single column machine for drilling or for tapping.
这是一台获得专利的单柱机，可以用来钻孔或攻丝。
youdao