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The first person to describe the spiral was the Greek scientist Archimedes (approximately 287 BC-212 BC). The Archimedes spiral is a huge spiral in a wooden cylinder, used to lift water from one level to another, and irrigate the field. The true inventor may not be Archimedes himself. Maybe he just Read More
electric screw driverAn electric screwdriver is an electric tool used to tighten and loosen screws. The power tool is equipped with a mechanism for adjusting and limiting torque, which is mainly used in assembly lines and is one of the necessary tools for most production enterprises.Electric screwdr Read More