| 摘要 |
<p>An axial cutting tool comprises a shaft 3 engaged to a housing 27 with at least one housing 23 through which a pivotable arm 4 carrying a first cutter 5 is disposed therethrough. The arm is extended by upwards movement against a cam surface caused by a piston 2. The movement may be caused by a pulling motion from the surface or by gravitational forces acting on the tool.</p> |
