Contracting {HEAD ~ garter springs} 28 engage {TAIL ~ the footed portions} 18 of the sprags 16 and urge the cams into race engaging positions 
engage
Contracting { HEAD ~ garter springs } 28 engage { TAIL ~ the footed portions } 18 of the sprags 16 and urge the cams into race engaging positions
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH