The protection of ground sources for domestic and drinking water shall be strengthened. 对生活饮用水地下水源应当加强保护。
The uncertainty of measurement for the determination of total hardness of drinking water by EDTA titration method was evaluated. 对乙二胺四乙酸二钠滴定法测定生活饮用水总硬度的测量不确定度进行评定。