| 摘要 |
<p>The machine consists of a main arm which welded to one end carries a tool-carrying plate with drill-holes for fastening the tools; a sliding arm whose position is fixed by a regulating screw, a part which fastens the main arm and has a guide over which moves a sliding arm, and a ball-bearing which fastens the fastener part against the tool and is mounted on the end of the sliding arm.</p> |
