| 摘要 |
<p>The sleeve has a bent metal strip with threaded grooves in opposite side walls. Projections on opposite sides of the bent strip (1) have bent ends (2, 3) with overlapping parts (8, 9) bent inwards at a right angle. They have cutouts (12, 12', 13, 13') for the clamping screw. They are semi-circular in section and match the outer dia. of the screws. Tongues (10, 10 protruding through slots (11, 11') hold the sleeve more firmly.</p> |
