Chinese ⇄ English

电话自动交换
math.	automatic switching of telegraph and telephone

电话自动交换: 43 phrases in 12 subjects

Business	1
Electronics	8
Exhibitions	1
General	2
Hydroelectric power stations	3
Information technology	1
Metallurgy	1
Oil / petroleum	1
Space	1
Technology	20
Telecommunications	3
United Nations	1