A tool or machine used to smooth unformed surfaces of freshly placed concrete.

A tractor or other prime mover equipped with a blade attached by arms or brackets to its front end; used in pushing

A circular metal boss used by the ancient Romans as a decoration for fastening parts of doors; often highly ornamented.

1. A structure on the roof of a building covering a water tank, shaft, or service equipment. 2. A structure, as on

A roofing composed of three to five layers of asphalt felt laminated with coal tar, pitch, orasphalt. The top is