The particle separator includes {TAIL ~ a generally conical inclined leading surface} leading to {HEAD ~ a maximum radius} 
The particle separator includes { TAIL ~ a generally conical inclined leading surface } leading to { HEAD ~ a maximum radius }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD