But the short flame and high temperature of fully aerated burners conduct more heat through burners and that causes the head of burners overheat and material the size and structure of burners.

但是由于完全预混式燃烧器火焰短且温度高，增加了火焰向燃烧器的传热，造成燃烧器头部过热，使材料老化加快。

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The recuperators have high air resistance , low air preheating temperature and high fan pressure head , and fan has much noise to environment and are apt to break down with vibration .

此换热器空气阻力大，空气预热温度不高，风机压头高，环境噪声大，风机振动大、易损坏。

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Analysis result of high productivity gas Wells in Luojiazhai shows temperature effect of well bore as the key factor affecting well head pressure.

罗家寨高产气井测试分析结果认为井筒的温度效应是影响井口压力的关键因素。

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