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公开(公告)号：US3401263A
公开(公告)日：1968-09-10
申请号：US44838865
申请日：1965-04-15
Applicant: RICHARD C. BIRKEBAK
Inventor： BIRKEBAK RICHARD C
IPC: G01J5/00
CPC classification number: G01J5/522 , G01J5/0003 , G01J5/061 , G01J2001/0481 , G01J2005/0051 , G01J2005/0074
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