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mains frequency
IT 工频; 电网频率
tech. 工业频率
telecom. 市电频率
main frequency
hydroel.st. 主频
tech. 主要频率; 电源频率
mains-frequency
met. 工业频率; 电力网频率
mains frequency in electroheat
therm.energ. 工频 电热的
mains- frequency
: 16 phrases in 8 subjects
Air defense1
Compressors1
Electronics1
Mathematics1
Metallurgy1
Plastics1
Shipbuilding2
Technology8