When the 2223 (AD1680), French physicist, Dennis Papin (Denis Papin) built boiler pressure for use in cooking. Pressure cooker which is the first version. In order to prevent the explosion of the boiler pressure, Dennis Papin, design.(Release Valve) also noted that the period function of the valve as the rhythm of up and down make this idea about machine cylinder. But he did not create the steam engine that actually works. Later, engineers Thomas Savery.Be at work.
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