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四工 sìgōng
tech. quadruple; quadruplex
四工电报 sìgōng
telecom. quadruplex
四 工
: 46 phrases in 22 subjects
Advertising1
Agriculture1
Air defense2
Automobiles1
Aviation2
Commerce2
Company name1
Construction1
Drilling1
Economy1
Electronics1
General2
Geophysics1
Information technology2
Labor law2
Mechanics1
Metallurgy2
Space3
Technology10
Telecommunications3
Textile industry3
United Nations3