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запасное вещество stresses
agric.	reserves; reserve substances
biol.	storage compound
ecol.	reserve matter; storage matter
meat.	reserve substance
physiol., Makarov.	reserve material; storage material
запасные вещества
biotechn.	storage products (I. Havkin)
запасные питательные вещества
agric.	reserve constituents

запасное вещество: 2 phrases in 2 subjects

Animal husbandry	1
Makarov	1