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automatic switch
el.	自动转换〔转辙〕器
hydroel.st.	自动开关
mil., air.def.	自动切换
tech.	自动转换器
transp.	自动转辙器
wind.	自动断路器
automatic ally switch
geophys.	自动开关【切换】

automatic switch : 88 phrases in 20 subjects

Automobiles	6
Aviation	7
Compressors	1
Earth sciences	1
Electric machinery	6
Electronics	14
Geophysics	2
Hydroelectric power stations	2
Information technology	1
Mechanics	1
Metallurgy	1
Navigation	1
Oil / petroleum	4
Rail transport	1
Securities	1
Shipbuilding	5
Space	5
Technology	25
Telecommunications	3
Wind Energy	1