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1.The externally fired boiler is an efficient way to heat a large building.
外燃式锅炉是加热大型建筑物的高效方式。
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2.The externally fired boiler was designed to meet the needs of a growing city.
外燃式锅炉被设计来满足日益增长的城市需求。
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3. The externally fired boiler is a popular choice for industrial applications due to its reliability and efficiency.
由于其可靠性和效率，外燃式锅炉是工业应用中受欢迎的选择。