| 摘要 |
<p>An over-centre thrust spring assembly (19) pivotally connected at one end (22) to a fixed point (25) on the gun and at the other end (21) to a stop member defining a lever (10) urging the latter into an operative position bearing against the breech-block carrier (5), or into a second inoperative position out of the path of movement of the breech-block carrier (5), preventing a rebound of the lever (10) into said path.</p> |
