| 摘要 |
<p>a base (1), a longitudinal rail (2) for the movable mounting of a handle (3) carrying a blade or cutting tool (4), lateral folding arms (13) and an orientable set square (8). The handle (1) has: rolling elements (31, 32) and an antifriction piece (33), for movement on the rail (2), a longitudinal guide (34) for the interchangeable coupling of blade-holder pieces (41) and a bolt (35) for holding the blade-holder piece. The orientable set square (8) is fixed at different angular positions by means of a bolt (81) that is inserted in conical seats (16) in a circular arrangement or by means of a vertical-thrust flange (9). The base (1) comprises studs (12) for the mounting of the folding arms (13) with respective intermediate springs (14) and tension-adjusting nuts (15).</p> |
