Chalcogen, Conductor, Semiconductor, Cr-Cu-Fe-O, Magnetostriction

• P1521920-3
• P1521920-4
• P1521920-5
• P1521920-6
• P1521921-3
• P1521921-4
• P1521921-5
• P1521921-6
• P1521920-10
• P1521920-11
• P1521921-10
• P1521921-11