RoHS豁免条例有这么一条: # a& {; ^: V+ X$ t; s0 ?2 k8 L6. 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. 5 e1 y7 Q2 J3 z, q+ F; n* z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%;# \9 b5 g' G' F5 {1 ^+ V2 \- y