1) oil compensating relief valve
滑油平衡安全阀
2) balance safety valve
平衡安全阀
3) spring balance safety valve
弹簧平衡安全阀
4) counterweight relief valve
平衡重安全阀
5) balanced safety valve
平衡式安全阀
6) lubrication relief valve
润滑油安全阀
参考词条