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频率分析 pínlǜ fēnxī
hydroel.st. frequency analysis
频率分析
: 87 phrases in 23 subjects
Air defense5
Aviation7
Business1
Earth sciences5
Electronics19
General1
Genetics1
Geophysics5
Golf1
Hydroelectric power stations2
Information technology2
Multimedia1
Nautical1
Navigation1
Oil / petroleum4
Otorhinolaryngology1
Refrigeration1
Securities1
Shipbuilding1
Space5
Technology20
Water resources1
Wind Energy1