1) left track control valve
左履带控制阀
2) left track main control valve
左履带主控制阀
3) left track travel main control valve
左履带行走主控制阀
4) right track control valve
右履带控制阀
5) right track main control valve
右履带主控制阀
6) track main control valve
履带主控制阀
参考词条