Steam Boilers, Engines, Nozzles and Turbines
In a single acting steam engine

The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft

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Steam Boilers, Engines, Nozzles and Turbines
Carbonization of coal is the process of

Heating wood in a limited supply of air at temperatures below 300°C
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Pulverizing coal in inert atmosphere
Binding the pulverized coal into briquettes

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