| 单词 | ball bearing |
| 释义 | ball bearing From Longman Dictionary of Contemporary EnglishTechnology, Mechanicalball bearingˌball ˈbearing noun [countable]1 Tan arrangement of small metal balls that move in a ring, to make a part inside a machine turn more easily2 Tone of these metal ballsExamples from the Corpusball bearing• In the first system the rotation of the mouse's wheels or ball bearing are transferred to rollers. |
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