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доочистка n stresses
Gruzovik	additional cleaning; final cleaning
auto.	aftertreatment (отработавших газов I. Havkin)
chem.ind.	after-treatment (выхлопных газов Alexander Oshis)
construct.	post-treatment (напр., воды); polishing (воды); advanced waste treatment (сточных вод)
ecol.	advanced waste; final purification; fine purification; polishing process; post-treatment
energ.ind.	after purification (напр., воды); fine filtering
Makarov.	advanced treatment (сточных вод); polishing (воды или СВ); polishing treatment (сточных вод); tertiary treatment (сточных вод); tertiary treatment (удаление из сточных вод соединений азота и фосфора, ускоряющих эвтрофикацию водоёмов)
nat.res.	final treatment (sewage); secondary treatment (sewage)
O&G, gas.proc.	second-stage treatment
O&G, sakh.	final treatment
tech.	advanced treatment; afterpurification; polishing treatment; posttreatment (сточных вод); tertiary treatment; aftertreatment (сточных вод); polishing (сточных вод); secondary treatment
water.suppl.	fining (напр., вторичная очистка сточных вод; глубокая доочистка сточных вод)

доочистка: 87 phrases in 20 subjects

Agriculture	1
Automobiles	1
Construction	6
Ecology	27
Energy industry	12
Forestry	2
Hydraulics	1
Makarov	7
Meat processing	3
Natural resourses and wildlife conservation	2
Nuclear and fusion power	1
Oil processing plants	2
Oils and lubricants	1
Sakhalin	2
Technology	3
Tengiz	1
Transport	4
Water resources	1
Water supply	8
Weapons of mass destruction	2