air-operated clay spade

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List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have … Wikipedia
Carabane — Coordinates: 12°32′16″N 16°42′03″W / 12.5378°N 16.7008°W / 12.5378; 16.7008 … Wikipedia
Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… … Wikipedia
List of people from Michigan — A list of notable people from the U.S. state of Michigan. Bolding indicates places in Michigan. People from Michigan are sometimes referred to as Michiganders, Michiganians, or more rarely as Michiganites. Actors, entertainers and… … Wikipedia
Han Dynasty — 漢朝 ← 206 BCE–220 CE … Wikipedia
Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… … Wikipedia

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