{HEAD ~ The cutter} of the present invention is connected to {TAIL ~ the rotary unit} and adapted to contact the formations 
is connected to
{ HEAD ~ The cutter } of the present invention is connected to { TAIL ~ the rotary unit } and adapted to contact the formations
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH