annulus scraper环形刮蜡器;详细翻译
annulus test环空试压
tubular annulus管闸环状空间
tooth annulus齿圈;[机] 环状齿圈
annulus valve环形阀
annuli annulus的复数
annulus incision纤维环切开法
secondary annulus第二内齿轮
Of the 5 kinds of material for the age diagnosis of Tor(Folifer) Brevifilis Brevifilis,the annuli on the scale and opercular were easier to identify than the others,and the annulus on the cleithrum was very diffcult to observe.
结果表明,瓣结鱼这5种年龄鉴定材料的年轮特征各不相同。
参考来源 - 瓣结鱼的年轮特征与年龄鉴定N（名词） the area between two concentric circles 环面