{HEAD ~ The housing} 12 has {TAIL ~ a cup shaped design} with a ventilation opening 14 arranged at one end and a valve seat 15 arranged at the other end 
has
{ HEAD ~ The housing } 12 has { TAIL ~ a cup shaped design } with a ventilation opening 14 arranged at one end and a valve seat 15 arranged at the other end
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL 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