| 摘要 |
<p>An apparatus for boring a web of shape steel, comprising a boring unit (24) squarely facing a web of cramped shape steel (19), and an arm plate (11) for supporting the boring unit (24). The apparatus is further provided with a fastening unit (18) fixed to the arm plate (11) to support the shape steel (19) on the opposite side of the boring unit (24) by urging it in the direction substantially parallel to the axis of rotation of the boring unit (24).</p> |
