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公认的硬度划分是:
. O$ {( D" \+ k" IWater containing calcium carbonate at
% w& x: T0 T7 @( P. Qconcentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,
5 I2 x# k e, Z& [' umoderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
5 F% F, b" G" e/ \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:6 W" D( q v- k; B1 w8 G V8 N+ P
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.: c) u N1 s% a
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。, b6 o: D1 P+ o2 O& A( w
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