单词	downcomer
释义	downcomer noun : a pipe to conduct something downward: such as a : a pipe for leading the hot gases from the top of a blast furnace downward to the dust collectors and flue system b : a tube larger in diameter than the water tubes in some watertube boilers to conduct water from each top drum to a bottom drum under the influence of thermal circulation Word History Etymology down entry 2 + comer
随便看	backhandedly backhandednesses backhander backhanders backhandest backhanding backhands backhaul backhauled backhauling backhauls backheel backheeled backheeling backheels backhoe backhoes backhouse backhouses backing backing (up or away) backing (up) backing away backing down backing hammer

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