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转换管
el. switching tube
tech. cross-over connection
转换管
: 41 phrases in 17 subjects
Agriculture1
Air defense1
Automated equipment1
Automobiles2
Chemistry1
Dermatology1
Electronics7
General4
Genetics2
Geophysics1
Information technology1
Life sciences1
Oil / petroleum3
Refrigeration1
Shipbuilding1
Space3
Technology10