Because {HEAD ~ the rms voltage} is typically {TAIL ~ a better measure} of the true heat input to the weld by the welding process, the rms weight b is preferably greater than the average weight a, that is, b>a. Moreover, the sum of the weighting factors is preferably unity, that is, a+b=1 
is typically
Because { HEAD ~ the rms voltage } is typically { TAIL ~ a better measure } of the true heat input to the weld by the welding process , the rms weight b is preferably greater than the average weight a , that is , b > a. Moreover , the sum of the weighting factors is preferably unity , that is , a+b=1
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH