دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a blowout preventer that uses shear rams as closing elements.

n: A type of vertical seismic profile in which the source is a shear-wave source rather than a compressional-wave source. Shear waves travel through the Earth at about half the speed of compressional waves and respond differently to fluid-filled rock, and so