| 摘要 |
<p>The instrument consists of a handle (1) and two or more identical and parallel blades (2, 3, 11) that are fixed or adjustable at one end of the handle. In different versions the handle can be formed by extensions (5, 6) from the blades which are riveted or welded together, or the blades can be attached to the handle by rivets, nails, adhesive or a force fit. The blades are spaced between 2 mm and 2 cm apart and. according to the design, can be adjusted by a threaded mchanism. The handle can also have a magnetic section.</p> |
