{HEAD ~ The probe body} can be {TAIL ~ a longitudinal tubular body} having a front conical end 
be
{ HEAD ~ The probe body } can be { TAIL ~ a longitudinal tubular body } having a front conical end
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH