More specifically, {HEAD ~ the axially movable flange} of {TAIL ~ each pulley} is formed with an axially extending shoulder internally finished to surround, and be axially movable with respect to, its shaft 
of
More specifically , { HEAD ~ the axially movable flange } of { TAIL ~ each pulley } is formed with an axially extending shoulder internally finished to surround , and be axially movable with respect to , its shaft
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH