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