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公开(公告)号：US2912105A
公开(公告)日：1959-11-10
申请号：US43308654
申请日：1954-05-28
Applicant: GEN MOTORS CORP
Inventor： ALLURED ROBERT B , WALKER JOHN L
IPC: G01N3/42
CPC classification number: G01N3/42 , G01N2203/0212
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