| 1. | Many individuals choose to cover the ribs, producing a flat, level surface.
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| 2. | The floor otherwise forms a relatively level surface within the inner wall.
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| 3. | Levees are usually built by piling earth on a cleared, level surface.
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| 4. | A strong skater can reach speeds of 30 mph on a level surface.
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| 5. | Analogously, a level surface is sometimes called an implicit surface or an isosurface.
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| 6. | Intersections of a co-ordinate function's level surfaces with a trefoil knot.
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| 7. | Setting the tank on a level surface is important, too.
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| 8. | Press dough into prepared pan, being careful to level surface.
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| 9. | The surviving interior floor is a relatively level surface with some tiny craterlets scattered about.
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| 10. | It can compensate by providing a consistent, level surface.
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