(1) the use of vacuum tube, the output power, stable and reliable performance 
 (2) high sensitivity spark over-current protection circuit. Can be effectively cut off the excessive damage to the host due to high current output, the more effective control of spark 
 3 with the high-frequency frequency stabilizer and high frequency shielding to minimize high frequency interference 
 4 with overcurrent protection system, to increase the useful lives of the vacuum tube to protect the mold 
 A full set of high-quality components, stable performance, reliable 
 6. Installation of high-precision temperature control to ensure welding consistency