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mask, bimetal definition

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a mask formed by chemically etching openings in a metal film or plate that is protected from the etchant in certain areas by a second metal. The second metal is generally applied to the first by electro-forming or coating. [ASTM F127-84]

See also:

longitudinal wave definition
lyophobic definition
Liquid chromatography columns definition
lyate ion definition
longitudinal relaxation time (T1) definition