| 摘要 |
<p>The keep (1) has a recess (2) in which there is a receiver (3) for T-slot (4) of a lug (5) that can be drawn in or out. The receiver of the T-slot is fixed in the keep and a mast front wall (11) may be fixed to a slidably mounted pole (12). The pole may have, at it?s free end, a thread (13) that can be screwed together with a wing or knurled nut (14). The receiver may complement the cross section of the keep and/or the T-slot of the lug. The receiver for the T-slot may be supported from the inner wall (6) of the keep.</p> |
