Really? That means the mechanical rig.

是吗？四正两倒是指机械钻机。

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This article is about a kind of mechanical-electric compound drive drill rig.

介绍了一种机电复合驱动石油钻机。

youdao

This article is about a kind of mechanical-electric compound drive drill rig.

介绍了一种机电复合驱动石油钻机。

youdao