1) housing drain plug

壳体排放塞
2) transmission filter housing drain plug

变速箱滤清器壳体排放螺塞
3) transmission charge filter housing drain plug

变速箱注油滤清器壳体排放螺塞
4) block drain plug

缸体排放螺塞
5) discharge cock

排放旋塞
参考词条