counterrecoil piston复进活塞
counterrecoil wedging复进楔紧
counterrecoil piston rod lug复进机杆固定凸座
recoil and counterrecoil system反后坐装置
counterrecoil piston rod复进机杆
recoil and counterrecoil mechanism反后坐装置
value type recoil counterrecoil mechanism活门式驻退复进机