单词	backup relay
释义	backup relay noun : a secondary relay to protect a power system against faults in the event of failure of the primary relay to function as desired Word History First Known Use 1950, in the meaning defined above
随便看	macuca macul- macula macula lutea maculacy maculae maculae luteae macular macular degeneration maculas maculate maculated maculates maculating maculation maculations maculature macule maculed macules maculi- maculicole maculicolous maculing maculo-

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