lip packing meaning in English

唇式衬垫
唇形密封件
带唇边环形密封

Hydraulic fluid power . multiple lip packing sets . methods for measuring stock heights
液体流体动力.多边缘包装装置.材料高度的测量方法
Fluid power systems and components - multiple lip packing sets - methods for measuring stack heights
液压气动用多层唇形密封组件.测量叠层高度的方法
Fluid power systems and components ; multiple lip packing sets , methods for measuring stack heights
流体传动系统和元件.多层唇形密封组件.测量叠合高度