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CN112537955B
一种掺杂改性钪酸铋-钛酸铅-铁酸铋三元体系压电陶瓷及其偶极子发射换能器
申请日: 2020-12-18
公开(公告)日:2023-04-07
济南大学
US4930427
Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
Svilainis
US4930427
Magnetic recording disc for computer data - has sector subjected to different treatment to prevent unauthorised copying Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
MICROSOFT CORPORATION
US4930427
Magnetic recording disc for computer data - has sector subjected to different treatment to prevent unauthorised copying Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
MICROSOFT CORPORATION
