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

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

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Steam Boilers, Engines, Nozzles and Turbines
The function of a piston rod is

To guide motion of the piston rod and to prevent it from bending
To convert heat energy of the steam into mechanical work
To transfer motion from the piston to the cross head
To exhaust steam from the cylinder at proper moment

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