| 摘要 |
<p>A power feed rotary tool, such as a drill or a tapper, has an electric motor for rotating the working head and a pneumatic system for advancing the working head. A control rod extends from one end of the tool housing, and is displaced together with the working head but does not rotate. The control rod controls the feed stroke of the working head. The electric motor is connected to the tool housing between its ends.</p> |
