- Supply TypeManufacturer, Exporter, Supplier
- Preferred Buyer Location All over the world
For demonstrating the principle of the parallelogram law of forces and polygon of forces. A unit is a drawing board size : 75 x 60cm fitted on two side pillars for standing. The board is supplied complete with two pulleys (clamp pattern) 3 x 50gm hangers and 12 slotted weight of 50gm, reel of cotton thread and a ring,