短语词组短语locking g pin 锁销locking crank pin 定位销locking shaft pin 锁轴杆销locking center pin 锁紧中心销locking split pin 保险开口销upper locking -pin 上锁销safety locking pin 安全栓locking g shaft pin 锁轴杆销locking pin protector flap 锁针保护布 返回 locking pin