• These procedures must incorporate adequate purge and evacuation times to allow the valve interior to be properly cleaned.

    这些程序必须包括充分的净化抽空时间允许适当清洁阀门内部

    youdao

  • The utility model relates to a multifunctional smoke emission valve which is suitable for the occasions of fire-fighting and smoke evacuation.

    实用新型涉及一种多功能防装置,适用于消防、排烟的场 合。

    youdao

  • The utility model relates to a multifunctional smoke emission valve which is suitable for the occasions of fire-fighting and smoke evacuation.

    实用新型涉及一种多功能防装置,适用于消防、排烟的场 合。

    youdao

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