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公认的硬度划分是:4 G! ]; V. f* O2 l+ T3 V/ n
Water containing calcium carbonate at8 U3 O8 t. a9 O' R1 ?5 T
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
/ A+ A3 D9 F/ _# M {0 ~moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
+ O4 L% Y4 s4 i爱城的水硬度在150-160之间,属于硬水,但不算很硬。这种硬度的水不需要在水厂进行软化处理,适当硬度的水对健康不但无害,反而有益。以下是加拿大主要城市水硬度指标: |& \9 S: \$ Q2 A& W! A
Montreal 116 ppm,Calgary 165 ppm, Regina 496 ppm, Saskatoon 160-180 ppm, Winnipeg 77 ppm,Toronto 121 ppm,Vancouver < 3 ppm, Charlottetown, PEI 140–150 ppm, Waterloo Region 400 ppm, Guelph 460 ppm.
7 y* _7 P1 Q7 ?9 J4 b- x在家里根本不需要安装什么软化水装置,而且都要把水烧开的做法也不可取,钙和镁都沉降了下来,其实这两种元素都是身体需要的,直接喝冷水最好,如果肚子能适应的话。. T- H8 t6 i: p1 ?& @3 r% o9 x: h
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