单项选择题
A.PadB.VirC.LayerD.Footprint
A.Keep OutLayerB.Top OverlayC.TOP LayerD.Bottom Layer
A.Keep OutLayerB.Top LayerC.Bottom LayerD.Mechanica]Layers
A.Keep OutLayerB.Top OverlayC.Mechanica]LayersD.Multi Layer
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