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power frequency
gen. 市电〔电源，工业〕频率
auto. 电气工频
met. 工业频率
oil 电源频率; 工业电频率; 市电频率
tech. 工业频率
telecom. 电力频率; 工业频率我国为50Hz, 美国为60Hz
wind. 工频
commercial power frequency
el.mach. 市电频率
power frequency: 135 phrases in 23 subjects
Agriculture2
Air defense4
Aviation12
Communications4
Earth sciences1
Electric machinery9
Electricity generation1
Electronics25
General1
Geophysics2
Hydroelectric power stations11
Information technology1
Mechanics1
Metallurgy1
Nautical1
Nuclear and fusion power1
Rail transport10
Shipbuilding1
Space8
Technology27
Telecommunications3
Thermal Energy1
Wind Energy8

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