单项选择题
A.[Nurn Lock]B.[Murn Lock]C.[Nurn Iock]D.[Murn Loock]
A.180v/1.5AB.250v/0.5AC.250v/1.5AD.380v/2.5A
A.前低后高B.前高后低C.左右扇形D.前后扇形