valve box for tapping valves 街道地下放水阀门的路盖
The bulk container can fix the extension tube well while not affecting the normal work of the liquid tapping valve.
本发明既能良好的固定延伸管，同时也不妨碍放液阀的正常工作。
The lower end of the vacuum filter is communicated with a circulating pump through a pipeline which is provided with a tapping valve.
真空过滤器的下端通过设有排液阀的管道与一循环泵连接。
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