(一)中國鉛錠牌號及化學(xué)成分見表3-1。表3-1鉛錠牌號及化學(xué)成分牌號化學(xué)成分(質(zhì)量分?jǐn)?shù))/%標(biāo)準(zhǔn)號Pb(不小于)AgCuBiAssbSnZnFe雜質(zhì)總和Pb99.99499.9940.0050.0010.0030.00050.0010.0010.00050.00050.06GB/T469-1995Pb99.9999.990.0010.00150.0050.0010.0010.0010.0010.0010.01Pb99 (共 7655 字) [閱讀本文] >>