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периодически изменяющийсяstresses
Makarov. cycling
периодически изменяться
tech. alternate
периодически изменяющийся: 34 phrases in 15 subjects
Aerohydrodynamics1
Construction3
Electrochemistry1
Electronics11
Gold mining1
Makarov4
Mass media2
Mathematics1
Metrology2
Nanotechnology1
Quality control and standards1
Quantum electronics2
Shipbuilding1
Technology2
Telephony1