陶瓷容器口部形式之一。器口边沿凸起一道厚边，线条浑圆似嘴唇，故名。唐代邢窑白瓷碗和历代一些罐等器物上均有所见。
将唇口滑动而上的传热归结为第二类边界条件；
The authors assume that the heat flux at the sliding surface of the lip occurs for the second boundary condition.
本文介绍了“可更换唇口橡胶油封”的设计，试制及试验结果。
This paper introduces the design, manufacture, and testing results of rubber seals with replaceable lip.
终端开口与转动风扇的比较表明，无隔道进气道的后向散射主要来源于外罩唇口的电磁波散射。
The comparison results of the bump inlet with opening terminal and with rotating fan at the outlet indicate that the electromagnetic scattering comes mostly from the mouth of inlet.
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