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frequency-change

gen. 变〔换〕频; 频率变换
frequency change
el. 频率变换; 变频
mil., air.def. 频率变化
frequency-change
: 22 phrases in 12 subjects
Air defense2
Animal husbandry1
Automobiles1
Aviation3
Electric machinery2
Genetics2
Information technology1
Mechanic engineering1
Metallurgy2
Military1
Technology4
Telecommunications2

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