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to phrases
frequency factor
met. 频率因数
space 频率因子
tech. 频率因素
frequency factor
: 22 phrases in 14 subjects
Air defense1
Artificial intelligence1
Aviation1
Chemistry2
Electronics3
Explosives and Explosive Ordnance Disposal1
General1
Information technology1
Oil / petroleum2
Polymers1
Shipbuilding1
Space3
Technology3
Telecommunications1