| 单词 | pressure ball |
| 释义 | > as lemmaspressure ball pressure ball n. ΚΠ 1898 Westm. Gaz. 24 Jan. 7/2 Passing a current of air by means of indiarubber pressure-balls through a glass bottle full of glass shavings steeped in sulphuric acid. 1985 Machine Design (Nexis) 24 Oct. 68 From the rollers, power flows through the drive ring, pressure balls, and drive flange to the output shaft. < as lemmas |
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