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симплексный канал stresses
comp.	single-ended channel
el.	spx channel
energ.ind.	simplex communication (retsenshtein)
tech.	half-circuit; one-way channel; push-to-type circuit (в телеграфии); simplex channel; simplex circuit
tel.	push-to-talk circuit
telegr.	push-to-type circuit

симплексный канал: 7 phrases in 4 subjects

Communications	1
Makarov	2
Mass media	3
Security systems	1