“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	lead optimization Lead ore resources lead oxide lead oxide vidicon lead poisoning lead pollution of agricultural soils lead rail lead refinery lead-removing function of health food lead salt materials for 1～3μm infrared detectors lead screw lead screw grinding machine lead selenide leadship art lead shurry lead storage battery lead styphenate lead sub-carbonate lead sulfate lead sulfide lead sulphide lead telluride lead tetraacetate lead tetraoxide lead tetroxide

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。