دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: also called a milled-tooth bit or a steel-tooth bit. See steel-tooth bit,

n: see steel-tooth bit.

n: also called milled bit or steel-tooth bit. See steel-tooth bit,

n: a roller cone bit whose cutting surface consists of a number of steel teeth projecting from the surface of the cones.

n: a roller cone bit in which the surface of each cone is made up of rows of steel teeth. Also called a milled-tooth bit or milled bit.

n: A kind of cone bit ,its tooth are shaped by milling cones blank.