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National Museum of American History on Twitter: "Today in 1880: Robert Leuchsenring's rotary water engine is patented: https://t.co/XhBuWsB1ro https://t.co/X0pwiK6fpj" / Twitter
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Milwaukee M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 1 in. SDS-Plus Rotary Hammer with 8.0 Ah Starter Kit 2912-20-48-59-1880 - The Home Depot
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Miniature 3 7/8 inch KINNEY'S May 26, 1880 Patent Rotary Slitting Gauge by PAUL HAMLER – Jim Bode Tools
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