metallic arc金属电弧metallicadj.金属的；金属般的metallic nano-partides金属纳米粒子metallic strength member金属加强芯metallic ore exploration金属矿勘查metallic diaphragm gauge金属膜式压力计metallic nano-particle金属纳米颗粒metallic powdery pigment金属粉末颜料metallic monetary system金属货币制度metallic percussion note金属叩击音metallic clothing welder金属针布焊接器metallic ceramic coating金属陶瓷涂层