All letter faces were set to the same height, to form an even surface of type.
The field formed a surface about four inches inward from this edge.
The stairs came down at the middle of the trunk, which was so big it formed a nearly flat surface.
Unlike liquids, gases cannot form a free surface on their own.
The floor otherwise forms a relatively level surface within the inner wall.
They would form a closed surface, like the surface of the earth.
These segments will then be arranged to form a single optical surface.
Overall, then, the flat tiles would form a curved surface.
If it is not, the joined panels won't form a smooth surface.
There was a click as the two halves came together to form a smooth even surface.