Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is a

Multi-tubular, horizontal, internally fired and mobile boiler
Single tube, vertical, externally fired and stationary boiler
Single tube, horizontal, internally fired and stationary boiler
Multi-tubular, horizontal, externally fired and stationary boiler

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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

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

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