{HEAD ~ The unit} may also be provided with {TAIL ~ a traverse motor} for driving the coring bit into an object being cored, and for withdrawing the coring bit once a core has been formed 
{ HEAD ~ The unit } may also be provided with { TAIL ~ a traverse motor } for driving the coring bit into an object being cored , and for withdrawing the coring bit once a core has been formed
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH