| 摘要 |
<p>The wrench has an end piece (1) including a concave face (5) to support nuts and a pin (6) engaged in holes. The pin is protruded on the concave face, and includes a handle (2). The handle comprises a rod (3) and a lever (4). The end piece and the lever are arranged perpendicular to the rod. The lever includes an indentation (8) for pushing the end piece. The indentation comprises an axis passing in front of the concave face. The concave face is in an arc of circle, and the axis of the indentation passes through center of the circle.</p> |
