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公开(公告)号：US2723589A
公开(公告)日：1955-11-15
申请号：US28676652
申请日：1952-05-08
Applicant: BULLOCK BYRRELL W , SHIRLEIGH SILVERMAN
Inventor： BULLOCK BYRRELL W , SHIRLEIGH SILVERMAN
IPC: G01J3/06
CPC classification number: G01J3/06
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