The reel is rotated by running on the inner surface of {HEAD ~ the tube} which is driven by, for instance, {TAIL ~ a sewing machine motor} 
is driven by
The reel is rotated by running on the inner surface of { HEAD ~ the tube } which is driven by , for instance , { TAIL ~ a sewing machine motor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL