| 单词 | stiffening-rib | 
| 释义 | > as lemmasstiffening-rib   stiffening-rib  n. ΚΠ 1869    W. J. M. Rankine Cycl. Machine & Hand-tools App. 26  				The distance between the stiffening ribs measured on a slope of 45°. < as lemmas | 
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