metallic arc金属电弧metallicadj.金属的；金属般的metallic nanoclusters金属纳米颗粒metallic foreign body金属性异物metallic tone quality金属音色metallic nanoparticle金属纳米粒metallicity parameter金属性参数metallic microcluster金属微簇metallic stuffing box金属填料箱metallic cotton print金属线印花布metallic modification金属变态metallic latex primer金属乳胶底漆