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保护继电器 bǎohù jìdiànqì
el. guard relay
el., meas.inst. protection relay
tech. conservation relay; keep relay
wind. protect relay; protective relay
保护〔止动〕继电器
swtch. keep relay
保护 继电器: 61 phrases in 11 subjects
Air defense2
Automobiles4
Electric machinery10
Electronics16
Hydroelectric power stations2
Information technology1
Metallurgy3
Rail transport2
Refrigeration1
Technology18
Telecommunications2