A method wherein full permanent set of {HEAD ~ the assembly} is achieved at {TAIL ~ about the same time} as maximum compression is applied 
A method wherein full permanent set of { HEAD ~ the assembly } is achieved at { TAIL ~ about the same time } as maximum compression is applied
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH