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指示信号
commun., railw. instruction signal
el. indicator light
oil indicator signal; pilot signal
tech. visual signal
指示信号
: 77 phrases in 17 subjects
Air defense3
Automobiles7
Aviation6
Communications2
Ecology1
Electronics13
Geophysics2
Hydroelectric power stations1
Information technology4
Oil / petroleum1
Rail transport1
Rowing1
Space6
Sports1
Technology26
Telecommunications1
Wind Energy1

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