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What are the famous great inventions in the world?
Square plate chain pump, wheel mill, hydraulic wheel mill, Shui Ye blower, vane rotary winnowing machine, piston bellows, spinning machine, hand spinning machine, unicycle, marine transportation, turning mill, harness for domestic animals, stirrups, chest harness, yoke, bow, kite, helicopter propeller, movable comic book rotating drum, deep drilling method, etc. Gunpowder for war technology, magnetic compass (magnetic spoon) for navigation, magnetic needle compass, magnetic compass, paper, block printing, movable type printing, metal movable type printing, porcelain.
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