In the present invention the term “power factor” relates to {TAIL ~ the power factor} of {HEAD ~ the welding process} 
In the present invention the term “ power factor ” relates to { TAIL ~ the power factor } of { HEAD ~ the welding process }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD