copperingn.铜包皮
coppern.铜;铜币;警察;紫铜色;有紫铜色翅膀的小蝴蝶vt.镀铜
copper - matrix composites铜基复合材料
copper-clad aluminium wire铜包铝线
copper-graphite composites铜-石墨基复合材料
copper steel compound powder铜铁复合粉
Copper in pyrite concentrate硫精矿中铜
Copper and nickel wastewater铜镍废水
copper processing enterprise铜加工企业
copper band-acrylic splint铜带环-树脂夹板