In manufacturing the power transmission belt of this invention, the top faces of the internal die are covered with {HEAD ~ a bulky nonwoven fabric} under {TAIL ~ non pressure} 
under
In manufacturing the power transmission belt of this invention , the top faces of the internal die are covered with { HEAD ~ a bulky nonwoven fabric } under { TAIL ~ non pressure }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL