以下为句子列表：
英文: A Double Check Detector Assembly shall be installed on fire protection systems when connected to a potable water supply.
中文: 当消防系统连接到饮用水供应系统时，应该安装一个双止回阀总成。
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英文: A Double Check Valve Assembly shall be installed at each noted location to prevent the unwanted reversal of polluted water into the potable water supply.
中文: 双止回阀总成应该安装在每个值得注意的位置，用于防止污水出现不需要的回流而流进饮用水供应系统中。
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英文: A set of mould with one module and two cavities was designed through the analysis of the technology of tap of potable water machine.
中文: 摘要通过对饮水机水嘴的工艺分析，设计了一模两腔的注射模。
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英文: All piping and fittings must be suitable for use with potable water and meet the requirements of local codes.
中文: 所有管道和连接件必须适用于使用生活用水，并符合当地规程的有关要求。
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英文: An air gap provides the unobstructed, physical separation between the discharge end of a potable water supply line and an open receiving vessel.
中文: 在饮用水供应系统的排放末端和开敞的接受容器之间，气隙提供不被堵塞的硬件分离。
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