美标C81400铜棒 C81500铜合金板 C81300铜合金圆棒 规格齐全

供应C81100铜合金 C81200铜板 C81400铜带 C81500铜棒 C81540铜管

C81400 铝青铜棒 c61400 铜管 c53200 铜排 QA15 QA17 铜板 激光

C80100 C80410铜材C81100 C81200合金铜C81400C81500铜板供货尺寸

C81100 C81200铜板C81400 C81500铜棒C81540 C82000C82200 C82400

C81400 C81300 锡青铜ZQSn10-5 C6301铜板C63000 C63200铝青铜棒

C80100 C80410铜材C81100 C81200合金铜C81400C81500铜板定制尺寸

厂家直销GCuCr铬青铜棒C81400 C81500铬青铜板 C81500铬青铜

C80100 C80410铜材C81100 C81200合金铜C81400C81500铜板定制尺寸

正宇现货 激光切割 图形加工C81200 C81400 C82000 C82200铜合金

C81400 C81300 锡青铜ZQSn10-5 C6301铜板 C63000 C63200铝青铜棒

C81400锡青铜Cu15Ni8Sn铜管zqsn6-6-3铜棒QSN4-3铜板C5101 CUSN12

C80100 C80410铜材C81100 C81200合金铜C81400C81500铜板定制尺寸

恒丰现货 激光切割 图形加工C81200 C81400 C82000 C82200铜合金

恒丰 图纸加工 喜现货C81200 C81400 C82000 C82200铜合金棒