| 单词 | shutter weir |
| 释义 | > as lemmasshutter weir shutter weir n. a type of movable weir consisting of one or more leaves pivoted about a horizontal axis at or towards the bottom and held nearly vertical until released. ΘΚΠ the world > the earth > water > lake > pool > [noun] > artificially confined water > contrivance for impounding water > weir > types of mill weirlOE foot weirc1474 kiddle1477 rowte weir1584 catchwater drain1744 carry1753 dam-head1762 overfall1764 gauge-weir1791 shutter weir1880 1880 Engineering 30 Jan. 102/1 The needle and shutter weirs had been the most extensively adopted, and were the best types of movable weirs... The shutter weir was the most suitable for high weirs across rapid rivers, and where the navigation was conducted by flushing. 1886 Encycl. Brit. XX. 574/2 The earliest form of shutter weir consisted of a gate, or shutter, turning on a horizontal axis at the bottom, supported by a prop when raised against the stream, and falling flat on the apron of the weir when the prop was withdrawn. 1903 Nature 20 Aug. 363/1 The Chanoine shutter weir is composed of a series of shutters supported centrally on a trestle, and turning on a horizontal axis. 1928 F. Johnstone-Taylor River Engin. iii. 69 The shutter weir, as a form of barrage, is not a new introduction, having been used..principally in Central Europe, for a number of years. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。