1) upper left slope control selector valve
上左侧倾斜控制选择器阀
2) left slope selector valve
左倾角选择器阀
3) right slope control selector valve
右斜坡控制选择器阀
4) left brake selector spool
左侧制动器选择器柱塞
5) selector control valve
选择器控制阀
6) left brake control valve
左侧制动器控制阀
参考词条