{TAIL ~ A pressure release opening} in the seal cover is in fluid communication with {HEAD ~ the circumferential passage} 
{ TAIL ~ A pressure release opening } in the seal cover is in fluid communication with { HEAD ~ the circumferential passage }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD