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公开(公告)号：US3277774A
公开(公告)日：1966-10-11
申请号：US25193363
申请日：1963-01-16
Applicant: SPEX IND INC
Inventor： LANDON DONALD O , JOSEPH MARCOVECCHIO
CPC classification number: G01J3/32 , G01J3/02 , G01J3/0286 , G01J3/06
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