A small valve, or tap fastened in a pipe, cylinder, etc., for drainage or release of pressure.
| 单词 | θ213935 |
| 释义 | society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > parts of > valves (30) petcock1838 A small valve, or tap fastened in a pipe, cylinder, etc., for drainage or release of pressure. tail-valve1839 (a) the air-pump valve in some forms of condenser; (b) = snifting valve at snifting, adj. sea-cock1855 In a marine steam-engine (see quot. 1858). robinet1867 A tap or valve in a pipe. Obsolete. rare. test-cock1877 (a) a valved cock for clearing a steam engine cylinder of water; (b) a tap through which a sample of fluid may be drawn for examination; (c) a tap… Walschaerts1880 Used attributively and in the possessive to designate a kind of valve-gear invented by Walschaerts, used on some steam locomotives (see quot. 1911). Subcategories:— for reducing pressure (2) — for expelling air (5) — for regulating steam (5) — throttle (4) — seat for (2) — devices for opening or closing (6) |
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