78209428
Jan 31, 2003
May 11, 2004
Educational science equipment used for student learning of simple machine principles, consisting of an inclined plane with wood car, wheel and axle, lever arm and pulley system with wood/plastic frame to support each substation, associated weights, force spring scales, distance measuring aid for calculating work, mechanical advantage and efficiency and instruction manuals sold as a unit therewith
Electrical and Scientific Apparatus