1.ˮ|(zh)
Ҏ(gu)4מɳ|(zh)ÿO(sh)Ъ(d)M(jn)ˮڼ̶ͶDc(din)ͶDc(din)ײˮףĨ⻬e6~8ƽמO(sh)aW(wng)ÿ2_(ti)0.9ǧߣEORO-
2ͣʽC(j)ˮԴɽˮˮ18~24ˮˮ|(zh)¡oȾ2.B(yng)
B(yng)ǰÿʯҏص(jng)ԇˮȫͶ\~NB(yng)ܶȞ700β/B(yng)Į(dng)Ҫ30%ʳ}Һ~w
3.
\~(g)wL(zhng)25ϣԔzʳˮϣֵ≥35%Ͷιǰëˢ̸Ƀʳ_(ti)ذͶι^Ҫ0.5%غùأ50ǧDϰ100ˣͶDʞ飺~w50~200ͶDʞ10%~4%;~w200~1000ˣͶDʞ4%~2.5%;1000Ϟ2.5%~1%,20犃(ni)
\~(du)Ҫ^ߣ(du)ز׃m(yng)ԲճҪ_ˮ5ppm,ˮ|(zh)ҪˬL(fng)زE׃≺ҪѲ^죬ȡЧA(y)ʩ
ڳB(yng)ֳ\~^Ҫÿ30죬þW(wng)һЩ\~x،(f)ѣ֮B(yng)ֳ@DZC\~B(yng)ֳ߮a(chn)Ҫg(sh)ʩ(jng)^\~_(d)70%_ʳϲ(f)ѡ