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noun | adjective | to phrases
houillère f
met. Steinkohlengrube f; Kohlenzeche f; Grube f; Steinkohlenzeche f; Kohlenbergwerk n
houiller étage adj.
earth.sc. Oberkarbon Abteilung
houillère
: 29 phrases in 9 subjects
Coal9
Construction1
Earth sciences2
Energy industry1
General1
Industry2
Metallurgy10
Mining1
Natural resourses and wildlife conservation2