inner lip seal 带内唇缘密封
inner aspect lip 唇内面
inner welding lip structure 内焊唇结构
inner aspect lower lip 释义下唇内面
lip on inner ring 内圈挡边
The inner lip and the outer lip respectively prevent oil from spilling, and prevent impurities from entering on different positions, and simultaneously play dual protection to the universal joint.
两者在不同 位置分别防油溢出、防杂质进入，同时对万向节起到了双重保护。
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
In use process of the nozzle, free end of the seal lip is shocked by environment pressure, so leans against exterior surface of the inner joint member for providing seal.
在吸嘴的使用过程中，密封唇的自由端受环境压力冲击，从而抵靠在内部接头件的外表面上，以便提供密封。
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