The method 1 wherein {HEAD ~ the strip} of foam rubber has {TAIL ~ a rectangularly shaped cross section} 
has
The method 1 wherein { HEAD ~ the strip } of foam rubber has { TAIL ~ a rectangularly shaped cross section }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL