The invention features {TAIL ~ a rubber thread} that has, in {HEAD ~ cross section}, two or more rubber portions 
The invention features { TAIL ~ a rubber thread } that has , in { HEAD ~ cross section } , two or more rubber portions
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH