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低电压继电器 dī diànyā jìdiànqì
geophys. under voltage relay
oil low-voltage relay
space undervoltage relay
tech. under-voltage relay
低 电压继电器
: 18 phrases in 8 subjects
Air defense1
Electric machinery2
Electronics1
General1
Geophysics1
Hydroelectric power stations3
Rail transport1
Technology8