| 单词 | rolling barrel |
| 释义 | > as lemmasrolling barrel rolling barrel n. now historical a rotating barrel used for agitating or mixing something; esp. one containing metal balls, used for mixing gunpowder. ΚΠ 1829 London Encycl. V. 697/1 The barrel churn, a kind of rolling barrel, with such dashers within as are calculated to quicken the process of making butter. 1841 Ordnance Man. for Use of Officers (U.S. Army Ordnance Dept.) viii. 150 In order to lessen the duration and danger of pounding in the mortars, the materials may be pulverized and mixed in rolling barrels, before being put under the pestles. 1874 E. H. Knight Amer. Mech. Dict. I. 238/1 Barrel, a cylindrical vessel moving on an axis, for..making gunpowder. In the latter case it is partially filled with bell-metal balls, and is called a rolling-barrel. 1957 C. P. Russell Guns Early Frontiers v. 221 Some powder makers..placed the ingredients (except the saltpeter) in a ‘rolling barrel’. < as lemmas |
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