Magnetic lenses 3/ 22 . . . using electromagnetic means only 3/ 24 . . . using permanent magnets only 3/ 26 .
(Magnetic lenses 3/ 22 . . . using electromagnetic; means; only 3/ 24) Context(Magnetic lenses 3 / 22 . . . using electromagnetic means,List([0, 55))):(Magnetic lenses; using; electromagnetic)
Magnetic lenses 3 / 22 . . . using electromagnetic means,List([0, 55))
Magnetic lenses 3/ 22 . . . using electromagnetic Magnetic lenses
means using
only 3/ 24
electromagnetic