The column of drill base is a trunk welding structure, and it is important to support the whole drill.

钻机底座立柱为箱形焊接结构，是整个钻机的支撑构件。

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The column of drill base is a trunk welding structure, and it is important to support the whole drill.

钻机底座立柱为箱形焊接结构，是整个钻机的支撑构件。

youdao