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производство CO₂ stresses
nat.res.	carbon dioxide production; CO₂ production
производство H2
energ.ind.	H2 production (ENG: H2 production – 77,4%; H2 generation – 21,5%; H2 synthesis – 1,1%; RUS: производство H2 – 49,3%; получение H2 – 41,6% синтез H2 -5190 – 5,4%; генерация H2 – 3500 – 3,7%  MichaelBurov)

производство H2: 7 phrases in 6 subjects

General	1
Mass media	1
Metallurgy	1
Oil processing plants	2
Trade classification	1
Winemaking	1