| 单词 | rising main |
| 释义 | > as lemmasrising main rising main n. (a) a principal pipe carrying water or gas vertically up through a building or a mine; (b) an electricity main passing from one floor of a building to another; = riser n. 11b. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > distribution system > [noun] > cable > supplying the public > inside building rising main1804 riser1898 1804 Trans. Amer. Philos. Soc. 6 i. 97 The drawing in Plate II, Fig. 9, will explain its construction; A the working barrel. B the piston. C the feed-pipe. D the rising main pipe. 1838 Civil Engineer & Architect's Jrnl. 1 189/2 Four pipes or rising-mains, the lower end of each being connected with a valve~box. 1901 W. Grafton Handbk. Pract. Gas-fitting viii. 110 Insuch [sic] a case the gas company would run the rising main up to the top floor inside the building. 1910 Encycl. Brit. IX. 198/2 The general arrangement for distributing current to the different portions of a building for the purpose of electric lighting is to run up one or more rising mains, from which branches are taken off..on each floor. 1967 G. A. T. Burdett Electr. Installations 37 Where conditions allow there are advantages in using purpose-made rising mains. 2004 J. Bridgewater Home Plumbing iii. 26 Main water comes into your home under pressure through a pipe called the rising main. < as lemmas |
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