valuvormi element sisemise õõnsuse või mõne teise keeruka elemendi (väljaulatuv osa, sügav süvend jms), mille valumudeli abil saamine on probleemne, moodustamiseks (vt valand, valumudel)
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Mitmekesistest rakendusvaldkondadest või nõuetest tulenevalt kasutatakse liivkärne, metallkärne, lahustuvaid kärne, keraamilise kärne jne.
a specially formed component inserted in a mold to shape the inner cavity or other part (protruding part, deep groove etc) of a casting that cannot be shaped as easily by the pattern (see: casting, pattern)
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According to different uses or requirements, there are sand core, metal core, soluble core, ceramic core and so on.
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