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临界频率
IT critical frequency
rem.sens. threshold frequency
space boundary frequency
临界振动频率
tech. critical frequency
振动临界频率
auto. critical frequency
临界频率 在电离层传播中
radio critical frequency in ionospheric propagation
临界频率
: 23 phrases in 11 subjects
Air defense2
Aviation2
Electronics2
Information technology1
Metallurgy1
Nursing1
Oil / petroleum1
Space3
Sports2
Technology7
Telecommunications1