sealcontact face的用法和樣例：
例句
- Unlike any other design, the Bi-Directional Knife Gate Valve provides a combination face and perimeter seal.
與其它設計不同的是，雙向刀閘閥結合了密封面與圓周密封的雙重優點。 - The inner mechanical seal shall be constructed with a solid block carbon rotating seal face and a solid block silicon carbide stationary seal face.
內置的機械密封結構應該採用一塊整體結晶碳旋轉密封面和一塊整體結晶碳化硅固定密封面。
