The high bending elasticity results in a long average service life and, in conjunction with a low stretch related slip and {HEAD ~ correspondingly small speed loss}, in {TAIL ~ a high degree} of efficiency 
The high bending elasticity results in a long average service life and , in conjunction with a low stretch related slip and { HEAD ~ correspondingly small speed loss } , in { TAIL ~ a high degree } of efficiency
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH