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
The barrel rollers are supported by the high inner-ring lip and can align themselves in the spherical outer raceway.
滚子具有高内圈垫片可以在球面外滚道自动调整。
The operational principle is that the utility model makes use of the extrusion between the inner ring lip of the seal ring and the stamping door body to achieve seal function.
本实用新型的工作原理是利用门密封圈的内圈唇口与冲压门体之间的挤压来实现密封功能。
The seal lips (12-14) consist of inner seal lips (12, 13) and an outer seal lip (14).
以及多个密封唇（12-14），由一体设置于金属环的橡胶状弹性材料制成。
The seal lips (12-14) consist of inner seal lips (12, 13) and an outer seal lip (14).
以及多个密封唇（12-14），由一体设置于金属环的橡胶状弹性材料制成。
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