| 单词 | valve face |
| 释义 | > as lemmasvalve face valve face n. ΚΠ 1864 Webster's Amer. Dict. Eng. Lang. Valve-face. 1887 D. A. Low Introd. Machine Drawing (1892) 70 The angle which the valve face makes with its axis is generally 45°. < as lemmas |
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