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  • Basic Machines and How They Work by United States Bureau of Personnel (English)

    • Item No : 388765746990
    • Condition : Brand New
    • Brand : No brand Info
    • Seller : the_nile_uk_store
    • Current Bid : US $21.97
    • * Item Description

    • 204 black-and-white illustrations. Beginning with the simplest of machines - the lever - the text proceeds to discussions of the block and tackle (pulleys and hoists), wheel and axle, the inclined plane and the wedge, the screw, and different types of gears (simple, spur, bevel, herringbone, spiral, worm, etc.).
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