The pump has {HEAD ~ a purge sealed hydrostatic bearing} which is spring loaded for {TAIL ~ minimum gap} 
is spring loaded for
The pump has { HEAD ~ a purge sealed hydrostatic bearing } which is spring loaded for { TAIL ~ minimum gap }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL