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防倒流

防倒流

防倒流

防倒流

1

Can be used after inflating , easy to carry . Inflated and deflated when the valve just pinch flat , a dedicated anti-backflow device gas .

充气后即可使用，便于携带。充、放气时仅需捏扁气门嘴，专设气体防倒流装置。

2

A combination fill valve and backflow preventer shall be installed on the boiler feed line to provide make-up water to the boiler .

在锅炉进水管道上应该安装组合进水阀和防倒流阀，为锅炉提供补给水。

5

The valve shall contain a Watts Regulator Model 9D backflow preventer and Model 1156 feed water pressure regulator.

这种阀门包含美国瓦茨调节阀型号 9D 防倒流阀和型号 1156 进水压力调节阀。

6

Experimental Study of the Reduced Reverse Circulation in Thermosyphon Solar Water Heater

防倒流循环家用太阳能热水器的实验研究

7

Development and application of anti-plugging and backflow-proof casing jet pump

防堵塞防倒流的套管射流泵研制与应用

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