... -resistant argon arc welding 2.solar pressurized water tank:With two coils(heat exchanger),specially design for split pressurized ... protected from atmospheric contamination by a shielding gas of argon;With inside plate at the inner cylinder bottom to ensure even ... working pressure:6bar,testing for 12bar5.with electric heater(220V,50HZ) can be 110V ,60HZ6.with accessory :exhausted valve,magnesium bar ...