ѡˮĥԭ ˮĥƷΪˮҵġζúЧѵõˮҵձϿɣڶˮҵй㷺ӦãӶΪˮҵľЧЧ档忴ˮĥҵݬ룬ˮĥгӣˮҵȷѡĥƷˮȶˮҵĽܼҪ һȶԭ ˮĥˮвС<0.5%IJˮƷкܴӰ졣ѡˮĥʱҪϸĥҵĹ״״пȣϵǷȫֶǷλȷˮĥƷȶѡͨϵ֤ҵ Լ۱ԭ ѡˮĥʱҪƷۣҪˮĥԼ۱ȣҪͨҵ֤ƷܣͶȣӶѡԼ۱ߵˮĥ Ϲұԭ ˮĥҪJC/T667-2004ҵҪ⣬ĥˮGB175-2007ұҪرкɷӺ0.06%ȷˮ;ԡ ġӦԭ ֿˮĥӼӦ⣬ĥˮӼкܺõӦԣнϺõʩܡ 塢Ľԭ ˮĥˮеòܵģúЧˮҵ״ԭϵȱ仯仯ѡˮĥʱҪˮĥҵԲƷĽҲҪˮĥҵĿƼзǷиʵзŶӺ䱸ȫļװ ԭ ȷʹˮĥҪѡˮĥʱһҪֿ似ˮƽΣǷλȣȷˮĥȷʹá |