| 摘要 |
<p>The invention relates to a tool of a breaking apparatus, such as a percussion hammer or percussion drill, especially for improving the lubrication of the tool. According to the invention, grooves (4, 5, 7) circling at least in one direction when the tool is rotated around the vertical axis (3) are formed on the outer surface of the tool (1) of the breaking apparatus, near the tool end (2, 8) to be attached to the breaking apparatus.</p> |
