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ciężki adj.
construct.	massiv; massig; dicht; fest
transp., avia.	schwer

ciężki: 74 phrases in 19 subjects

Agriculture	8
Chemistry	17
Construction	12
Earth sciences	1
Economy	2
Electricity generation	1
Energy industry	1
Environment	4
Food industry	3
Forestry	2
General	1
Health care	4
Law	1
Mechanic engineering	2
Medical	1
Mineralogy	2
Pharmacy and pharmacology	4
Physical sciences	3
Technology	5