标准版本采用腈双密封唇和标准油脂。
Standard versions feature a nitrile double-lip seal and standard grease.
本实用新型提供的双密封燃气专用阀属于一种燃气专用阀。
The utility model provides a double-sealed special valve for combustion gas, belonging to a special valve for the combustion gas.
曲径汽封和活塞环提供了双密封系统，使油保持洁净并减少磨损。
Labyrinth seal and piston ring provide a dual sealing system, keeping oil clean and reducing wear.
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