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 exhaust steam from the cylinder at proper moment
To convert heat energy of the steam into mechanical work
To transfer motion from the piston to the cross head

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Steam Boilers, Engines, Nozzles and Turbines
The proximate analysis of fuel lists

Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight

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