دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the name used for the working platform of the derrickhand (the monkeyboard) when it is located at a height in the derrick or mast equal to two lengths of pipe joined together. Compare fourble board, thribble board.

n: the platform on which the grabber works


working platform for the derrickman on a drilling rig.