一、燃气互换性和燃具适应性随着我国燃气工业的不断发展,供气规模、气源类型、用具类型都在不断增加。在五十年代,我国燃气供应系统的气源几乎是单一的炼焦煤气。但从六十年代开始,天燃气、液化石油气、油制气等各种类型的气源大量发展,因而具有多种气源的城市越来越多。例如,上海就有炼焦煤气、连续直立式 First, gas interchangeability and gas appliance adaptability With the continuous development of China’s gas industry, the scale of gas supply, gas source types, equipment types are increasing. In the 1950s, the gas source of our gas supply system was almost a single coking gas. However, since the 1960s, various types of gas sources such as natural gas, liquefied petroleum gas, and oil gas have been developed in large numbers, and thus more and more cities have a variety of gas sources. For example, Shanghai has coking gas, continuous vertical