A driving belt has {HEAD ~ a textile supporting element} composed of {TAIL ~ multi functional threads} or yarns which contain plastic fibers of high breaking strength and heat resistant natural fibers 
composed of
A driving belt has { HEAD ~ a textile supporting element } composed of { TAIL ~ multi functional threads } or yarns which contain plastic fibers of high breaking strength and heat resistant natural fibers
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH