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Definition of Lancashire boiler
1. Noun. A steam boiler with two flues that contain the furnaces and extend through the boiler from end to end. ¹
¹ Source: wiktionary.com
|  | 
1. Noun. A steam boiler with two flues that contain the furnaces and extend through the boiler from end to end. ¹
¹ Source: wiktionary.com