Represents opening in construction items such as mounting panels and sheets, that are drilled or manufactured by NC robots
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                            Drilling oDrillingHole = Drilling.CreateTapHole(oProject, 50.0, null); oDrillingHole.SetParent(oPlane, true); oDrillingHole.GetSourceMates(true)[0].SnapTo(oPlane.GetTargetMates(true)[0] as PlaneMate, 0.0, 0.0, 0.0); Drilling oDrillingHexagon = Drilling.CreateHexagon(oProject, 75.0, null); oDrillingHexagon.SetParent(oPlane, true); oDrillingHexagon.GetSourceMates(true)[0].SnapTo(oPlane.GetTargetMates(true)[0] as PlaneMate, 40.0, 30.0, 50.0);  | 
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