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Control supply line water pressure. install a soft seated spring loaded check valve upstream of the assembly.
控制供应管道的水压。在总成的上游安装一个软阀座，弹簧负载止回阀。
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Air valve size and airflow resistance losses of valves always speed and the size of the spring-loaded edge.
气阀阻力损失大小与气流的阀隙速度及弹簧力大小有关。
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