20 Ton Natural Gas Boiler High Efficiency Azerbaijan

Timeline of United States inventions (before 1890) - Wikipedia

Water-tube boilers are used for high-pressure boilers. Fuel is burned inside the furnace, creating hot gas which heats up water in the steam-generating tubes. The water-tube boiler was co-invented and co-patented by George Herman Babcock and Stephen Wilcox in 1867. 1867 Refrigerator car