Steam Boilers, Engines, Nozzles and Turbines
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

Packaged boiler does not exist
Supplied mounted on a single base
Purchased from several parties and packed together at site
Supplied by same manufacturer loose and assembled at site

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

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

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