Above: Salivary lips showing parallel ridges of inner surface of lower lip, last larval instar of Osmia chalybea.
上图：壁蜂老熟幼虫下唇内表面的平行纹
2
The inner cage lips have a close width tolerance.
内笼嘴唇有密切的宽度公差。
3
All sealed lips provided between the first and second parts of the air guide chunnel forms on the exterior joint member and encloses exterior surface of the inner joint member at least partly.