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обратный сводstresses
gen. inverted arc
archit. invert
construct. inverted vault
geol. inverted arch
mil., tech. arched floor (в почве подземной выработки)
mining. floor arch; arched floor (в выработке)
road.wrk. arch invert
tech. concave crown
обратный свод: 4 phrases in 3 subjects
Construction2
Electronics1
Mining1