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Mechanical Engineers Rocks. - Worm Driven Rack and Pinion:- This gear pair model was created by the Illinois Gear & Machine Co Chicago. Cornell University acquired a set of 15 models around
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Technical Gear Bricks Part Worm Rack Axle Pin Classic Accessories Moc Train Car Crane Model Diy Building Blocks 32494 32239 Part | Fruugo FR
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