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Hinterfüllung f
gen. backfill
construct. backfilling; backing (Erdstoff); infill
industr. backing
mining. backfill (Material)
tech. back-up
transp., mil., grnd.forc., construct. back-filling; embankment; fill; fill embankment
Hinterfüllung: 6 phrases in 3 subjects
Coal3
Construction2
Mining1