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внутриквартальный коллектор stresses
gen.	submain sewer (A sewer into which the wastewater from two or more lateral sewers is discharged and which subsequently discharges into a main, trunk or other collector. uoguelph.ca Alexander Demidov)
construct.	submain sewer
O&G, sakh.	utility gallery (подземный канал или тоннель для подземных коммуникаций Bauirjan)