{HEAD ~ The present invention} is {TAIL ~ a coring unit} adapted to be engaged to an articulated arm, to reduce the labor necessary for on site coring of sewage and water pipes 
{ HEAD ~ The present invention } is { TAIL ~ a coring unit } adapted to be engaged to an articulated arm , to reduce the labor necessary for on site coring of sewage and water pipes
HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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