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à superfície
transp., construct.	at grade

à superfície: 114 phrases in 24 subjects

Agriculture	14
Chemistry	1
Coal	2
Communications	2
Cultural studies	2
Earth sciences	14
Electric machinery	1
Electronics	17
Environment	1
Fish farming pisciculture	1
General	10
Hobbies and pastimes	1
Industry	6
Labor law	3
Law	1
Life sciences	4
Materials science	1
Mechanic engineering	5
Metallurgy	15
Natural sciences	3
Nuclear physics	1
Scientific	1
Statistics	2
Transport	6