| 单词 | d valve |
| 释义 | > as lemmasD valve a. Used in reference to the shape of the letter, as D block, D-front, D link, D trap, D valve, etc.; D-shaped, D-fronted adjs. See also dee n. Π 1794 D. Steel Elements & Pract. Rigging & Seamanship I. 156 D-Blocks are lumps of oak in the shape of a D..bolted to the ship's side, in the channels. 1827 J. Farey Treat. Steam Engine 707 Sliding valves..called D valves. 1849 E. E. Napier Excursions Southern Afr. I. 161 The saddle..should be abundantly studded..with iron loops: or as they are—from their shape—termed in Colonial phraseology, D's. [See dee n.] 1849 E. E. Napier Excursions Southern Afr. I. 163 Append to one of the D's of the said saddle, a leathern bottle. 1883 W. S. Gresley Gloss. Terms Coal Mining 72 D link, a flat iron bar attached to chains, and suspended from a hemp rope to a windlass at surface. It is a loop in which one man is lowered and raised in an engine-pit. 1890 W. J. Gordon Foundry 135 A closed crucible with a D-shaped opening in one of its sides. 1892 T. B. F. Eminson Epidemic Pneumonia 11 The catch-pit was covered in by a D trap. 1895 Westm. Gaz. 22 Nov. 5/3 D-shaped and oval tubes. 1908 Westm. Gaz. 16 Nov. 4/2 A D-front limousine. 1908 Westm. Gaz. 19 Nov. 5/2 A ‘D’-fronted landaulette. < as lemmas |
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