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为什么自来水中有时会有异味?为什么要定期测定饮用水中氯的含量?自来水煮沸后,为什么有时表面有一层白色漂浮物或杯底会留下水垢?也许你还未曾关注过这些问题。但是,这些问题水正在悄无声息地侵害着你的身体健康。
Why water sometimes smells? Why regular determination of chlorine in drinking water? After boiled water, why sometimes there is a layer of white floating surface or cup will leave a scale? Perhaps you have not been concerned about these issues. However, these questions are silently infringing on your health.