{TAIL ~ A deformable diaphragm} 4 is clamped between {HEAD ~ the ring} and the structure 
{ TAIL ~ A deformable diaphragm } 4 is clamped between { HEAD ~ the ring } and the structure
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH