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优质铜合金GB-CuSn2ZnPb(2.1099) GBCuZn33pb(2.0291)铜棒 板卷带
厂家直供GBCuZn33pb铜棒2.0291国标铜合金GBCuZn39pb铜板2.0383
供应GBCUSN5ZNPB 2.1097铜合金GBCUSN2ZNPB 2.1099铜棒GBCUZN33PB
GBCuZn33Pb?GBCuZn39Pb铅黄铜六角棒耐磨板铅黄铜光棒铜带
铜锌合金板GBCuZn33Pb 薄板GBCuZn37Pb厚板可零切加工雕刻激光
厂家直供GBCuZn33pb铜棒2.0291德国铜合金GBCuZn39pb铜板2.0383