annulus
特殊用法collecting annulus1.■集水槽(叶片上去湿用)dense primary annulus1.■行星传动第一级固定齿轮graphite annulus1.■石墨环grouted annulus1.■灌浆环带inlet annulus1.■进汽环室nuclear pore annulus1.■核膜孔环outer annulus1.■外圆周pit annulus1.■纹孔环pregenicular annulus1.■膝前色环(直翅目)primary annulus1.■初级齿圈secondary annulus1.■第二内齿轮superior annulus1.■上位菌环tooth annulus1.■环状齿圈