The dashed lines in the drawings illustrate portions of the vacuum that form no part of the claimed design. The dot-dashed lines illustrate unclaimed borders around portions of the subject matter being claimed.
The surface shading and contour lines (including any CAD or wire frame lines) in the drawings is a drawing convention to represent character and contour; it does not illustrate material, surface ornamentations, or surface decoration and forms no part of the claimed design.