ostiole

The analysis indicated that the current method for machining the abnormal deep ostiole has many drawback.

结果表明,当前异形深小孔加工技术存在诸多缺陷。

Under scanning electron microscopy, a polyhedral and scale-like endocyst was covered with thick ectocyst and an ostiole was veiled with operculum at the junction of ectocyst and endocyst.

在扫描式电子显微镜下可以看到，内间骨状突起相连处，而且可以见到厚具皱折体。