双重柔性金属O形环阀座具有静止和动态密封性能，确保符合防火规则要求。
A double flexible metallic O-Ring seat provides a (1) static and (2) dynamic seal and assures compliance to fire-safe specifications.
双重柔性金属O形环阀座具有静止和动态密封性能，确保符合防火规则要求。
A double flexible metallic O-Ring seat provides a (1) static and (2) dynamic seal and assures compliance to fire-safe specifications.
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