(on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion.
[ 1695-1705 ]
(on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion.
[ 1695-1705 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012