L602斯米克银焊条Wire&rod丝183-256Sn30Sb2PbRem.Solderingofcopper,brass,copperalloysandgalvanizedironplainsheet.铜、黄铜、铁、镀锌铁皮的钎焊30SnL603斯米克银焊条Wire&rod丝183-235Sn40Sb2PbRem.Solderingofcopper,copperalloys,steelandzincparts.铜及铜合金、钢、锌制零件的钎焊40SnL604斯米克银焊条Wire&rod丝183-222Sn90Sb≤0.15PbRem.Solderingofcopperandsteelforfoodandmedicinefield.食品、***所需铜、钢等金属的钎焊90Sn)