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симметричный четырёхполюсник stresses
el.	symmetrical four-terminal
electr.eng.	symmetrical network; symmetrical two-port
IT	bilateral network
Makarov.	balanced quadripole; symmetrical quadrupole
math.	symmetrical quadripole
media.	symmetrical two-terminal-pair network
tech.	balanced network; symmetrical four-pole; balanced four-pole network; balanced quadripole network; symmetrical four-pole network; symmetrical four-terminal network; symmetrical quadripole network; symmetrical two-port network

симметричный четырёхполюсник: 3 phrases in 3 subjects

Electrical engineering	1
Mass media	1
Technology	1