| 单词 | primary air |
| 释义 | > as lemmasprimary air primary air n. see sense A. 25. primary air 25. Esp. in primary air. Designating air admitted to the fuel in a burner or furnace at or before the earliest stage of combustion. Cf. secondary adj. 3w. ΘΚΠ the world > matter > gas > air > [noun] > specific air > admitted to fuel in furnace primary air1915 1915 Proc. Royal Soc. 1914–15 A. 91 245 A typical modern gas fire consists of a series of atmospheric burner nozzles..arranged equidistantly along a common horizontal supply pipe provided with a suitable means for properly adjusting the relative gas and primary air supplies. 1931 Engineering 9 Jan. 39/3 The primary air and coal enter at the side of the burner through a long, narrow port. 2000 P. W. B. Semmens & A. J. Goldfinch How Steam Locomotives really Work ii. 33 The fireman can control the amount of primary air entering the bottom of the firebox by means of dampers. < as lemmas |
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