{HEAD ~ A fixed scroll member} 4 is secured to {TAIL ~ the cylindrical portion} 1A of the casing 1 
is secured to
{ HEAD ~ A fixed scroll member } 4 is secured to { TAIL ~ the cylindrical portion } 1A of the casing 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH