C70240-H力学性能C70240-H材质证明C70240-H标准C70240-H用途C70240-H铜排、C70240-H铜棒、C70240-H铜板、C70240-H铜带、C70240-H铜线、C70240-H铜管、C70240-H铜箔、C70240-H铜片、C70240-H铜材、C70240-H铜料、C70240-H线料、C70240-H方铜、C70240-H六角铜、C70240-H片材、C70240-H密度C70240-H铜焊丝、C70240-H焊条(供应铜合金价格、规格、标准、对应牌号、用途、图片、密度、成分表、材质证明))