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