{HEAD ~ One or more mud} pump 10 pump mud from the pits through {TAIL ~ the fill line} 12 and into the interior of the drill pipe DP 
{ HEAD ~ One or more mud } pump 10 pump mud from the pits through { TAIL ~ the fill line } 12 and into the interior of the drill pipe DP
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH