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химическое разложение stresses
construct.	chemical degradation
energ.ind.	chemical decay; chemical disintegration
environ.	chemical degradation (The act or process of simplifying or breaking down a molecule into smaller parts, either naturally or artificially; Действие или процесс упрощения или разложения молекулы на более мелкие части в результате естественных или искусственных приёмов)
geol.	decomposition
tech.	chemical decomposition; chemolysis

химическое разложение: 17 phrases in 9 subjects

Astronautics	1
Construction	1
Ecology	2
Electronics	1
General	4
Makarov	3
Nanotechnology	2
Physics	1
Weapons of mass destruction	2