理学 色谱法 释 isoelectric focus electrophoresis；IEF 等电聚焦电泳 基于物质的等电点不同而进行的电泳分析方法。又称等电点聚焦或电聚焦（electrofocusing）。
计算机应用 信息系统与信息化 释文 information engineering facility, IEF 信息工程设施
- principal plane
- principal plane of crystal
- principal plane of photograph
- principal plane pattern
- principal planet
- principal point
- principal point of photograph
- principal polarization
- principal polynomial
- principal projection property
- principal punishment
- principal quantum number
- principal quintic form
- principal radius of curvature
- principal ray
- principal reduced form
- principal refractive index
- principal remainder
- principal representative
- principal right ideal
- principal right ideal ring
- principal ring
- principal role performance, additional role performance and double role performance of one character
- principal root
- principal root of unity