1) winch valve access cover
绞盘阀检视盖
2) relief valve access cover
安全阀检视盖
3) supply valve access cover
供油阀检视盖
4) drain valve access cover
排泄阀检视盖
5) crankcase drain valve access cover
曲轴箱排油阀检视孔盖
6) fuel drain valve access cover
燃油放油阀检视盖
参考词条