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dur adj.
agric.	duro
pack.	rigido
French thesaurus
dur être au adj.
slang	en réclusion; être dans son, travailler avec énergie

dur: 316 phrases in 44 subjects

Agriculture	24
Antennas and waveguides	2
Banking	1
Chemistry	5
Commerce	1
Communications	4
Construction	12
Criminal law	1
Cultural studies	6
Earth sciences	14
Economy	2
Electric traction	1
Electronics	6
Energy industry	2
Environment	5
Finances	4
General	10
Health care	3
Industry	38
Information technology	2
Law	17
Life sciences	8
Lighting other than cinema	1
Magnetics	1
Marketing	1
Materials science	5
Mathematics	1
Mechanic engineering	2
Medical	38
Metallurgy	46
Microsoft	9
Mineral products	1
Name of organization	1
Natural sciences	10
Packaging	3
Patents	2
Pharmacy and pharmacology	1
Scientific	1
Social science	4
Statistics	1
Technology	4
Textile industry	1
Transport	10
Wood processing	5