The proper method for draining both Y-pattern stop-check valves and isolation gate valves is shown for typical mounting positions.
图中所显示的是Y型截止止回阀和隔断闸阀排泄的正确方法的典型安装位置。
The proper method for draining both Y-pattern stop-check valves and isolation gate valves is shown for typical mounting positions.
图中所显示的是Y型截止止回阀和隔断闸阀排泄的正确方法的典型安装位置。
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