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Watt steam engine
The Watt steam engine (alternatively known as the Boulton and Watt steam engine) was the first type of steam engine to make use of steam at a pressure just above atmospheric to drive the piston helped by a partial vacuum. Improving on the design of the 1712 Newcomen engine, the Watt steam engine, developed sporadically from 1763 to 1775, was the next great step in the development of the steam engine. Watt's invention was a key point in the Industrial Revolution.
Watt's two most important improvements were the separate condenser and rotary motion.〔
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〕 The separate condenser, located external to the cylinder, condensed steam without cooling the piston and cylinder walls as did the internal spray in Newcomen's engine, more than doubling Watt's engine's efficiency.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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