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Force Board Bench Type P-1515 |
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| 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. |
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