- convergence magnet
- focus magnet
- focusing magnet
- 聚焦: focus; focusing; concentrate
- 磁铁: magnet; ferromagnet; magneti ...
- 弱聚焦磁铁: weak-focusing magnet
- 径向聚焦磁铁: radial convergence magnet
- 阶梯型聚焦磁铁: stepped focusing magnet
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