kaarkeevitus piki õmblust asetseva kattega elektroodiga, mis toetub õmbluse servadele ja mille ots liigub edasi raskusjõu või vedru toimel, an arc welding process in which electrodes of maximum size are fastened to an electrode holder, which can automatically slide up and down a bar or rod held at a predetermined angle; the top of the electrode is located at the root of the joint