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A periodic field formed with three or five lens elements can be used as an image-forming lens in ion-optics.
由三个或五个透镜元素组成的周期场，可以作为离子透镜使离子束成象。
youdao
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A periodic field formed with three or five lens elements can be used as an image-forming lens in ion-optics.
由三个或五个透镜元素组成的周期场，可以作为离子透镜使离子束成象。
youdao