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природоохранная зона stresses
gen.	protected environmental zone (felog); conservation area (AD)
construct.	scenic zone; nature preservation area
ecol.	nature conservancy zone (Irina Konyukova Terentieva); nature reserve (Andrey Truhachev); nature sanctuary (Andrey Truhachev); preserve area (Andrey Truhachev); protected area (for wildlife Andrey Truhachev)
environ.	conservation area (Alexander Demidov)
O&G, casp.	Sensitive Area (Yeldar Azanbayev); sensitive area (Yeldar Azanbayev)
O&G, oilfield.	Environmentally Sensitive Area (в общем смысле Motivator)

природоохранная зона: 6 phrases in 5 subjects

Caspian	2
Earth sciences	1
Ecology	1
Energy industry	1
Makarov	1