片语
piston dust seal活塞防尘罩
Piston bar seal拉桿封
piston ring seal system活塞环密封系统
piston packing活塞密封圈;活塞填料
piston rod seal活塞桿密封
piston head seal活塞头密封
piston top seal柱塞顶部密封
hydrodynamic piston reciprocating seal液压缸活塞密封
piston ring seal胀圈密封
teflon piston oil seal特氟隆活塞油封