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отстойный колодец stresses
auto.	mud settling pit
construct.	clarification well; settling well; sumpwell; drainage pit; drainage tank; silt basin
ecol.	mud chamber pit; mud setting pit; mud sump
geol.	sump
mil.	settling pit
mil., tech.	mud-setting pit; mud settler
mining.	percolation pit
railw.	catch basin
road.wrk.	sump hole

отстойный колодец: 2 phrases in 2 subjects

Construction	1
Metallurgy	1