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critical frequency
auto. 振动临界频率
el.mach. 危险频率
IT 临界频率
tech. 截止频率; 熔结临界频率; 临界振动频率
critical frequency in ionospheric propagation
radio 临界频率 在电离层传播中
critical frequency: 21 phrases in 11 subjects
Air defense2
Aviation2
Electronics2
Information technology2
Metallurgy1
Nursing1
Oil / petroleum1
Space2
Sports2
Technology5
Telecommunications1

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