The precise equipment employed should not be considered as {HEAD ~ a limiting factor} of {TAIL ~ the present invention} 
of
The precise equipment employed should not be considered as { HEAD ~ a limiting factor } of { TAIL ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL