swivel bolt

• 旋转螺栓

swivel bolt的用法和样例：

例句

1. Locking is achieved using the separate rotating bolt with four radial lugs that enter the breech of the barrel for engagement with respective cuts.
   锁是取得使用单独的旋转螺栓径向四个耳片进入膛的枪管接触与各自的削减。