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sur'face bound'ary lay"er

the thin layer of air adjacent to the earth's surface, usually considered to be less than 300 ft. (91 m) high. Also called sur'face lay"er, atmospheric boundary layer, friction layer, ground layer.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

surface-active agentsurface condenser


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