Designed to prevent the flow of contaminated water back into the potable water supply, these devices require no plumbing changes, and screw directly onto a sill cock.

其功能在于防止污染水回流到饮用水供应系统中，这些装置不需要对改变管线，只需要直接螺纹旋在洒水龙头上即可。

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Pneumatic Angle. Vent valve, filter, the drain valve, the valve, the diaphragm valve, cock, piston valve, valve, valve, copper heat water valves, balance valve, trap, solenoid valves.

排气阀、过滤器、排污阀、底阀、隔膜阀、旋塞阀、柱塞阀、铜阀门、保温阀门、水利控制阀、平衡阀、疏水阀、电磁阀。

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In long lassoes from the Cock lake the water flowed full , covering greengoldenly lagoons of sand, rising, flowing.

像是倒一根长套索似的，水从满满当当的科克湖里溢了出来，将发绿的金色沙滩淹没，越涨越高，滔滔滚滚流去。

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