| 摘要 |
<p>The system consists of an elongated slot (8) in a flat wall lying parallel to the axis of the pin (15). The slot is shaped to provide cam surfaces for a spring clip (17) which fits into an annular groove (16) in the pin. The slot has a wide section (14) at its outer end for insertion of the clip, and two locking zones (12,13) separated by necks (10,11) from the slot's main body (9). When the pin is in locked or retracted positions the spring clip is located in one of the two locking zones.</p> |
