Accordingly, under oil pressure, the main oil seal surface can work.
因此主封油面是处于油压下工作。
Why do I have to seal my stone surface and grout?
为什么要对石材表面采取密封和灌浆处理？
Perfect seal the bottom and the surface, waterproof and dustproof.
完美密封的底部和表面，防水和防尘。
First, the water pump mechanical seal ring on the surface of metal corrosion.
第一，水泵的机械密封上金属环表面均匀腐蚀。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
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