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przemienny n
math.	alternado

przemienny: 61 phrases in 15 subjects

Education	1
Electric motors	3
Electric traction	2
Electricity generation	4
Electronics	12
Lighting other than cinema	1
Mathematics	4
Municipal planning	1
Polymers	2
Power electronics	21
Power lines	3
Rail transport	3
Telecommunications	1
Telephony	2
Thermal Energy	1