Average type beam drill is composed of base, inside and outside column, rocker arm, main spindle box and job.

普通型摇臂钻床由底座、内外立柱、摇臂、主轴箱及工作组成。

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In the mechanical structure of the spindle box is the main drive designed to be given under the conditions of the main spindle speed drive system design.

在机械结构中主要是主轴箱的传动设计，能够根据以给定的条件主轴转速来设计主传动系统。

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In the mechanical structure of the spindle box is the main drive designed to be given under the conditions of the main spindle speed drive system design.

在机械结构中主要是主轴箱的传动设计，能够根据以给定的条件主轴转速来设计主传动系统。

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