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3 Источники информации, прин тые во внимание при экспертизе 676665 4 1. Авторское свидетельство СССР № 421721, кл. D 21В 1/04, 1974.3 Sources of information taken into account in the examination of 676665 4 1. USSR author's certificate No. 421721, cl. D 21B 1/04, 1974.
SU762412370A1976-10-181976-10-18Defibration process automatic control method
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