AC-DC electrode 交直流两用焊条

Longqin DC grounding electrode 龙青直流接地极

DC grounding electrode 直流电极 ; 直流接地极

dc-type electrode 直流电极

dc ground electrode 直流接地极

DC earthing electrode 直流接地极

dc grounding-electrode 直流接地极

electrode dc resistance 电极直流电阻

single electrode dc arc furnace 单电极直流电弧炉