| 释义 |
ˈdown-comer
a. One who comes down.
b. techn. A pipe or tube to convey water or gas downwards (cf. prec. 2).
1868Atkinson Cleveland Gloss. 1888Lockwood's Dict. Mech. Engin. 115 Down-comer, or down-take, the vertical pipe which conducts the waste gases from the top of a close-mouthed blast furnace into the blast main. 1896Daily News 20 Apr. 5/2 In the Yarrow boiler there are no outside downcomers. 1910Chambers's Jrnl. Jan. 60/2 At the extremities of the two drums are large tubular connections, the uptake being at the front end (where the hottest temperatures prevail), and the downcomer outside the furnace at the rear end, which is practically cool. 1950Engineering 30 June 722/2 Fed from the steam and water drum through downcomer tubes. |