An electric motor changes electrical energy into rotational mechanical energy. A motor works on the same principle as a galvanometer, except that ther …
Chicago White Metal Casting, Inc. is a world class die caster of Aluminum, Magnesium and Zinc alloy components for a broad range of industries. This h …
Download the absolute modern authority on Washington DC today. DC is the magazine for the discriminating reader and one of the first city-regionals av …