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