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The Series 2300 is recommended where city water pressure is to be reduced to supply plumbing fixtures to prevent violent pressure fluctuations.
这个系列2300被推荐用于打算将城市水压降低以供应卫生洁具，避免出现猛烈的压力波动现象。
While the construction and protection of water sources usually imposes a series of negative external influences on the local residents, which weakens the sustainability of water supply.
城市水源地建设保护同时又对当地居民施加了一系列负面外部影响，削弱了城市水资源供给的可持续性。
The Series 7 Backflow Preventers provide cost-effective backflow protection of the public water supply when used according to the local or state plumbing code requirements.
系列7防回流阀提供性价比高的、符合当地或州管道有关规定要求的公用水供应防回流保护装置。
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