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公开(公告)号:US3237449A
公开(公告)日:1966-03-01
申请号:US21988662
申请日:1962-08-28
Applicant: RALPH BRANDT
Inventor: RALPH BRANDT
IPC: G01L1/08 , G01L13/02
CPC classification number: G01L1/086 , G01L13/02