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à ciel ouvert
coal.	open cut; open pit; opencast
met.	above ground; in open cut

à ciel ouvert: 107 phrases in 20 subjects

Agriculture	11
Coal	10
Construction	23
Economy	1
Environment	6
General	6
Hydrology	1
Industry	1
Life sciences	5
Mechanic engineering	1
Medical	1
Metallurgy	12
Mining	4
Municipal planning	4
Natural resourses and wildlife conservation	9
Social science	1
Technology	3
Transport	2
United Nations	3
Water resources	3