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公开(公告)号：US1906476A
公开(公告)日：1933-05-02
申请号：US54559831
申请日：1931-06-19
Applicant: GEN ELECTRIC
Inventor： MARCELLUS FREDRICK S , RUSHER MERLIN A
IPC: G01D15/14
CPC classification number: G01D15/14
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