... 2. Double Pulse, built-in water tank, Al welded well. 3. CE,SGS, ISO9001, CCC MIG-500P Double Pulse Aluminum Inverter Digital Welding Machine ... can control the waveform.5, Digital wire-feed controlling system can make the aluminum wire feed steadily.6, Design ... avoiding over-current, over-voltage, over-heating, wire-blocking9, Automatic welding can be worked if the machines are equipped with ...