| 单词 | drum ring | 
| 释义 | > as lemmasdrum ring   drum ring  n. 		 (a) Anatomy and Zoology the bony ring to which the tympanic membrane is attached; cf. tympanic ring at tympanic adj. 1a;		 (b) a circular ring around something drum-shaped. ΚΠ a1836    Encycl. Metrop. 		(1845)	 VII. 355*/2  				There is not any bony external auditory passage; and the drum-ring, facing outwards and downwards, is large. 1839    Railway Times 4 May 362/1  				Drum rings; cone pullies; lamp posts of all sizes and designs. 1984    Otorinolaringologia 34 529/2  				Ponticulus lateralis.—The trabecula that connects the eminentia pyramidalis with the drum ring. 2010    U.S. Patent 2010/0279839 1/1  				In its drum ring, the drum magazine includes tool chambers which extend parallel to the main axis. < as lemmas | 
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