The gas can be a bottle with argon arc welding gas with two shielded welding machine

Not a bottle, argon arc welding, is the use of argon gas, two shielding welding is the use of CO2, the difference between the two welding methods, first of all, the protective gas is different. The difference between the welding material is two shielding welding with disk wire, argon arc welding with a long wire. The difference between the weld seam is argon arc welding seam clean without residue, carbon dioxide gas shielded welding with spatter slag.