دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. an abrasive material composed of small quartz grains formed from the disintegration of preexisting rocks. Sand consists of particles less than 2 millimetres (0.078 inches) and greater than 1/16 millimetre (0.062 inches) in diameter. 2. sandstone.

n: an abrasive material composed of small quartz grains. The particles range in size from 1/16 mm to 2 mm.the term is also applied to sandstone.