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