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逆数 nìshù
tech. inverse number
逆数
: 58 phrases in 19 subjects
Agriculture2
Aviation2
Bridge card game1
Bridge construction1
Business1
Cryptography2
Earth sciences2
Economy3
Electronics5
General3
Hydroelectric power stations1
Information technology3
Mathematics2
Metallurgy3
Oil / petroleum5
Space3
Technology16
Telecommunications1
Water resources2