1) pilot control valve block
先导控制阀体
2) pilot control valve
先导控制阀
3) boom pilot control valve
动臂先导控制阀
4) hand pilot control valve
手动先导控制阀
5) individual pilot control valve
专用先导控制阀
6) left hand pilot control valve
左侧先导控制阀
参考词条