backflow的意思|示意

Contact the factory for specific approvals on the reduced pressure backflow preventer.

如果需要特殊的减压防回流阀的认证,请与工厂联系.

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Four required per backflow preventer.

每个防回流阀需要四个.

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Efficiency and backflow current are the two most important criteria of multistage depressed collector.

效率与电子回流是多级降压收集极的两个非常重要的指标.

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Media type check valve for preventing backflow.

止回阀类用于阻止介质倒流.

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Especially made for testing all reduced pressure zone backflow preventers.

专用于检测所有减压区防回流阀.

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Also, mechanical backflow preventers and air gaps can be bypassed.

此外, 机械式防回流阀和气隙可以作为旁路.

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