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... e is a lever type.
Another 11 years later, it was still Papin who proposed the idea of a piston steam engine, but did not actually start to manufacture it.
Until the 31st year of Kangxi, the real industrial steam engine appeared, which belongs to the vacuum steam engine.
In the forty-fourth year of Kangxi, the atmospheric steam engine was born, and it was quickly used in coal mines, which can easily drain groundwater.
Watt improved the atmospheric steam en ...
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