短语词组短语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 返回 annulus