The computer generates {HEAD ~ custom pattern maps} by altering {TAIL ~ the standard pattern maps} based upon the cloth cutting dimensions 
by altering
The computer generates { HEAD ~ custom pattern maps } by altering { TAIL ~ the standard pattern maps } based upon the cloth cutting dimensions
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH