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公认的硬度划分是:4 T, h. Q K6 X8 V' p4 F2 F
Water containing calcium carbonate at* u0 q3 o+ ?; U4 `$ Q
concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l,8 a& S, q# t$ J ? ~6 N
moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard
' `, F4 e; l& E* m! ~7 @( |( k3 o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:/ ~3 V0 }7 M3 C5 G+ f' U9 `% x$ |
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. X1 R+ F0 ?4 q3 X! 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。$ P# m2 A- O+ g% b2 `5 n) Q
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