{TAIL ~ a pair} of {HEAD ~ sleeves} loosely fitted about said other shaft and movable away from said one shaft, and 
{ TAIL ~ a pair } of { HEAD ~ sleeves } loosely fitted about said other shaft and movable away from said one shaft , and
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH