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光电继电器 guāngdiàn jìdiànqì
el. light relay
IT photoelectric relay
met. scanner
tech. photoelectrical relay
光电继电器
el.mach. phototube relay; photoelectric relay
光 电继电器
: 54 phrases in 12 subjects
Automobiles5
Aviation2
Electric machinery1
Electronics3
General2
Geophysics1
Metallurgy4
Oil / petroleum3
Power system protection6
Rail transport1
Shipbuilding1
Technology25