permanent-magnet focusing [电子] 永磁聚焦

permanent-magnet focusing TWT 永磁聚焦行波管

periodic permanent magnet focusing 周期永磁聚焦

focusing magnet [核] 聚焦磁铁 ; 聚焦磁石

permanent magnet focusing system 永磁聚焦系统

focusing quadrupole magnet 聚焦四极磁铁 ; 聚焦四极透镜磁铁

stepped focusing magnet 阶梯型聚焦磁铁

weak-focusing magnet 弱聚焦磁铁

focusing g magnet 聚焦磁铁 ; 聚焦磁石

double focusing magnet 双聚焦磁铁