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combustion residue
auto.	燃烧残余物
tech.	燃烧残渣; 燃烧残余; 燃烧残留; 燃烧灰烬; 燃烧残留物
combustion residue A residual layer of ash on the heat-exchange surfaces of a combustion chamber, resulting from the burning of fuel
environ.	燃烧残余物 (燃料燃烧产生的剩余灰层，在进行热交换的燃烧室表面产生。)