RoHS豁免条例有这么一条: ( c9 K' A# w( p: V$ j; |6. Lead as an alloying element in steel contaiing up to 0.35% lead by weight, aluminum containing up to 0.4% lead by weight and as a copper alloy contaiing up to 4% lead by weight. * g$ ]/ @) f7 I( \0 q铅作为合金元素在钢合金中达0.35%,铝合金中达0.4%和铜合金中达4%;& E6 j! i* \6 A5 G; _