如何有效地检测空气预热器表面的燃料油污沉积物的温度，是防止空气预热器表面起火所必须考虑的问题。
It is very important problem how to detect aggregate fuels and sediments temperature on air preheater parts surface effectively in order to prevent air preheater from fire.
1969年6月22日，俄亥俄州克里夫兰的凯霍加河着了一场大火，表面上看是由于火车点燃地面的废油引起火星导致的。
On June 22, 1969, the Cuyahoga River in Cleveland, Ohio, caught fire, apparently after sparks from a train ignited a surface oil slick.
三个测试样机中的每一个都应从1米高处跌落，这样使他撞击电池的最可能导致起火或爆炸的表面位置。
Each of three samples is to be dropped from a height of 1 m, so it strikes a concrete surface in the position that is most likely to produce the adverse results in explode or catch fire.
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