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Amazon.com : HSL Telescope for Adults & Kids, 70mm Aperture 400mm Focal Length Refractor Telescope for Astronomy Beginners(20x-100x) - Travel Telescopes with Carry Bag and Adapter(White) : Electronics
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How telescope is made - material, manufacture, making, history, used, parts, components, dimensions, procedure
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How telescope is made - material, manufacture, making, history, used, parts, components, dimensions, procedure
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