{HEAD ~ The thickness} of the bladder is gradually decreased from the portions of the bladder, which correspond to the beads of the still unvulcanized tire, to {TAIL ~ the portion} of the bladder, which corresponds to the tread of the still unvulcanized tire 
{ HEAD ~ The thickness } of the bladder is gradually decreased from the portions of the bladder , which correspond to the beads of the still unvulcanized tire , to { TAIL ~ the portion } of the bladder , which corresponds to the tread of the still unvulcanized tire
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH