The new designed valve has metal-metal plane hard airproof structure, using durably grinding material near the flowing road to improve the airproof surface usage life-span.
设计的阀门采用了金属-金属的平面硬密封结构，在流道附近采用耐磨损的材料，提高阀门密封面的磨损寿命。
As it was sunrise, sunlight sprinkled on the surface of the lake, revealing a kind of hard to explain Road, delicate and pretty unknown.
此时正值日出，阳光洒在湖面上，露出一种说不清道不明的清秀。
As it was sunrise, sunlight sprinkled on the surface of the lake, revealing a kind of hard to explain Road, delicate and pretty unknown.
此时正值日出，阳光洒在湖面上，露出一种说不清道不明的清秀。
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