Multifunctional TIG/MMA/CUT 3 in 1, easy to operate, portable, durable ... current -Weight and volume are greatly reduced, but efficiency is raised by over 30% -Working with TIG/MMA, ... output current is constant current -Working with CUT, due to rapid-circulation ... , turn into strong plasma ARC -CT312/416 is wildly used in welding and cutting steel, such as stainless steel ...