{HEAD ~ The valve} 11 has {TAIL ~ a housing} 12 with a spring 13 arranged in it 
{ HEAD ~ The valve } 11 has { TAIL ~ a housing } 12 with a spring 13 arranged in it
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH