Statistic and Dynamic Study of Torsion, Consists of a plate with central hole equipped with two pulleys with ball bearing. Set of 7 torsion lines with tips. Eight round weights
Dynamics Cart Set, 3 Wheeled (Set Of 2) - 12in X 3.5in, Dynamic Trolley - 3 Wheeled, Without Hoops, Carts Have With Low-Friction Ball-Bearing Wheels, Fitted With High Quality Frictionless Nylon Ball Bearing Wheels,
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