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公开(公告)号：DE898116C
公开(公告)日：1953-11-26
申请号：DEW0007458
申请日：1951-12-19
Applicant: WEISE ARTUR DR-ING , MAECHLER MEINRAD DIPL-PHYS , STEEGMAIER KARL DIPL-ING
IPC: G03B15/00
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