Often times {HEAD ~ the links} and the keeper arms had to be soldered to {TAIL ~ the pivot bar} to prevent movement therebetween 
soldered to
Often times { HEAD ~ the links } and the keeper arms had to be soldered to { TAIL ~ the pivot bar } to prevent movement therebetween
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH