A shallow section may also be cut out from the bottom surface of each wing.

This bottom surface is marked only by a few tiny craters.

Rims are crucial to the joining of the wall to a top or bottom surface.

The shape of bottom surface is made by the container the glass was melted in.

If the poles were the larger top and bottom surfaces, it seems pretty straightforward.

The art is hidden on the bottom surface of the tables.

The runners may be simply the bottom surfaces of the drawer.

They looked carefully at the bottom surface of the third rail.

However the ray reflecting off the bottom surface travels a longer path.

He noted a bit of white powder sifted over the bottom surface.