... of use :apply to protecting arc welding with inert gases and plasma jointing ,cutting ... products :high melting point ,steady electric arc ,without self-consume .Tungsten increasing 0.15-4% Tho 2 ... pole ,prolong its life ,not pollute the welding seam ,increase launching ability of tungsten pole electrons ... and so on Therefore ,the quality of welding seam is high. 2. Export tungsten electrodes ...