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branch exchange
el.	小型交换机
IT	变换分机
multimed.	小交换机
tech.	分局; 交换分机

branch exchange: 93 phrases in 16 subjects

Agriculture	1
Aviation	3
Business	1
Construction	2
Data processing	1
Electronics	28
General	3
Hydroelectric power stations	1
Information technology	9
Multimedia	4
Name of organization	1
Nuclear and fusion power	1
Rail transport	1
Space	2
Technology	13
Telecommunications	22