| 摘要 |
<p>The fastening and adjusting device includes a pair of upwardly hinged rods (2,3), a U-shaped element (6) is hinged at the lower end of at least one of the rods; the lower end has a substantially rounded surface (10) and the U-shaped element defines a cavity between its legs (7) and the same surface; a support member (11,14) can be inserted in the cavity and can be locked against the surface by means of an adjustable abutment means (9); the support member (11,14) is adapted to support a lead holder (13), a drawing pen (12), a point, or similar.</p> |
