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。
In order to meet the requirements for the position of hub hole, the paper introduces the structure principle, operation process and characteristics of simple drilling jig used in the beam drill.
为了满足轮毂孔的位置要求，介绍了在摇臂钻床上使用的简易钻模的结构原理、操作过程和特点。
The laser, with its beam of strong light, can drill a hole in a diamond, and yet can be so well controlled that it can be used in delicate eye operations.
凭着本身强烈的光束，激光可在钻石上钻一个洞，而且可以被很好地控制，因此能用于精密的眼部手术。
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