“periodic permanent magnetic focusing”的概念、定义、翻译、参考文献-科学参考

单词	periodic permanent magnetic focusing
释义	periodic permanent magnetic focusing Encyclopedia 工学电子注聚焦释 periodic permanent magnetic focusing周期永磁聚焦采用沿电子注行进方向周期变化的磁场实现电子注聚焦的磁聚焦方式。简称PPM聚焦。
随便看	ballistite ballistocardiography ballistospore ball knot ball lens ball line picking ball mill ball mill work index balloelectric Ball of wool ballometer ballonet balloon balloon astronomy balloon-based astronomy balloon-based IR astronomy balloon-based UV astronomy balloon-based X-ray astronomy balloon-based γ-ray astronomy balloon-borne astronomy balloon-borne instrument balloon-borne IR telescope balloon-borne photometer balloon-borne spectroscope balloon-borne telescope

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