{HEAD ~ The outer metal layer} is formed of {TAIL ~ a first metal} that has a coefficient of thermal expansion larger than a coefficient of thermal expansion of a second metal that forms the inner metal layer 
is formed of
{ HEAD ~ The outer metal layer } is formed of { TAIL ~ a first metal } that has a coefficient of thermal expansion larger than a coefficient of thermal expansion of a second metal that forms the inner metal layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH