单项选择题
A.清除B.复位C.关机D.清零
A.KM1.3吸合B.KM2.4吸合C.KM1.2吸合D.KM3.4吸合
A.500msB.1000msC.1500msD.2000ms
A.5VB.10VC.12VD.24V
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