covered welding electrode meaning in English

药皮电焊条

Research and development of weathering steels titanium and calcium type covered welding electrode for rolling stock
铁道车辆用钛钙型耐候钢焊条的研制
" ubridge brand " marble mostly to use in slagging powder with drug cover welding electrode . improve slag basicity , steady arc , increase surface strain . it also used on architecture industry
粤桥牌大理石粉为白色或浅灰色矿粉，主要用于药皮焊条等焊接材料的造渣造气剂，可提高熔渣碱度稳