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单词 mechanical twin
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mechanical twin
mechanical twin n. Metallurgy a twinned crystal produced by mechanical deformation.
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mechanical twin1923
1923 R. Glazebrook Dict. Appl. Physics V. 344/1 These internal stresses cause internal straining of the metal, which in turn causes the formation of numerous mechanical twins.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VIII. 293/1 Typical phenomena observable are...effects of deformation—strain markings,..mechanical twins, and microcracks.
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