Generally, there should not be any nitrite in drinking water; while it is found through monitoring that the water detained in tap-water pipe is polluted by nitrite to some extent.
经监测发现，在自来水管中滞留过的水，不同程度地存在亚硝酸盐。
Once the water is shut off inside, go outside and open the outside taps as well. This will drain any water remaining in the pipe or in the tap, so there's nothing to freeze.
一旦关闭这只阀门切断室内水路后，立即到室外打开水龙头，排掉积存在管子里或者水龙头里的水，以确保无可结冰的物质。
But, no matter how simplistic this design is, you will still have to solder copper pipe joints if you want to tap into your existing hot water system.
但是，这个设计无论多么简单，你总得要焊接铜管，以便接入你现有的热水供应系统。
Endocrine disrupting compounds in tap water mainly stem from the pollution of raw water for water supply, concrete tank and lining of still pipe in water supply system, and chlorination process.
残留在自来水中的内分泌干扰物质的来源主要包括水源污染，配水管网及这些化合物质在氯消毒过程中的副产物。
In this paper, the design, installment and application of digital broadcasting station in tap water pipe network detection dis-patcher system are narrated.
本文介绍了数字电台在自来水管网监测调度系统中的设计、安装和使用。
Along with the urban construction expansion, the Xiamen peripheral countryside zone also gradually USES the tap water, the water supply pipe network unceasingly expands.
随着城市建设的扩大，厦门周边农村地区也逐渐用上自来水，供水管网不断扩大。
The treated waste water is led through pipe to toilet to replace tap water for flushing.
经过处理后的杂用水通过管道连接抽水马桶，以取代自来水冲洗。
The hot water heat exchanger respectively connects to tap water pipe and heat insulating water tank.
该热水换热器分别与自来水管和保温水箱连接。
The water inlet of the toilet is communicated with a tap water pipe through a valve.
所述坐便器的进水口通过阀门与自来水管连通。
The water inlet of the toilet is communicated with a tap water pipe through a valve.
所述坐便器的进水口通过阀门与自来水管连通。
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