单词	downcomer
释义	downcomer /ˈdaʊnkʌmə / noun A pipe for the downward transport of water or gas from the top of a furnace or boiler.They responded by putting forward a new plan - using the tides of the Huangpu to wash the existing downcomers and main sewer regularly.... The size and number of downcomers installed varies from one type of boiler to another, but downcomers are installed in all naval boilers.
随便看	rerelease re-render re-rendering re-repeat re-report re-representation re-resolve re-resolved rere-supper re-return re-reveal re-revise re-revision re-revolution re-revolutionize re-ride rerig rerigging re-ring re-rise re-rising re-rivet re-riveted re-robe re-roll

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