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	[книга]
	Performance evaluation of ducts with non-circular shapes and laminar fully developed flow
	Petkov, Valentin Metodiev - Петков, Валентин Методиев
	Gabrovo : Ex-press
	2019
ISBN:	978-954-490-649-8
	Топлотехника Енергетика Енергийна ефективност

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