1) boom and stick vent valve group
动臂和铲斗杆放气阀组件
2) boom/bucket check valve group
动臂/铲斗单向阀组件
3) boom-stick-bucket combination
动臂-铲斗杆-铲斗组合
4) front shovel stick and boom
前铲斗斗杆和动臂
5) boom and stick drift reduction valve
动臂和铲斗杆沉降[偏移]减压[速]阀
6) boom and stick shock reduction valve
动臂和铲斗杆缓冲减压阀
参考词条