| 摘要 |
<p>A horizontally protruding boom is mounted on a holding block behind a front workpiece support bench in a circular saw machine. A guide unit on the block, in which the boom slides, swings up from a horizontal boom setting, about an axis vertical to the saw blade operative plane. A control stop is operative between the boom and block. This releases the guide unit swivel motion only when the boom is at the block side end stop of its thrust, and blocks its sliding by swinging the boom upwards.</p> |
