Extrude Direction Along Vector
You can extrude 2D and 3D sketches normal to the face, or you can select a Direction of Extrusion 
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You can also select a Direction with the Dome feature.
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Use any of the following for Direction of Extrusion
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Cylindrical faces
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Linear edges
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Conical faces
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Linear sketch entities
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Planar faces
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Reference axes
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Sketch points
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References planes
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Vertices
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Points in reference geometry
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