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公开(公告)号：US2147961A
公开(公告)日：1939-02-21
申请号：US17763537
申请日：1937-12-01
Applicant: METRAWATT AG FABRIK ELEK SCHE
Inventor： ALBRECHT BERNHARD , GUIDO BEYRICH
IPC: G01J1/04
CPC classification number: G01J1/04 , G01J1/0271 , G01J1/0437
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