This is the basic principle behind electromagnetic propulsion.
这是电磁推进力的基本原理。
A new method of measurement on near field electromagnetic radiation of printed circuit boards is described with the basic principle of its operation discussed.
文中主要阐述了一种测量印刷电路板近场电磁辐射的新方法，讨论了此种方法的基本工作原理。
The present paper pinpoints the basic principle of probe-type electromagnetic flowmeters.
本文分析了探头式电磁流量计的基本原理。
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