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公开(公告)号：US3253458A
公开(公告)日：1966-05-31
申请号：US32890363
申请日：1963-12-09
Applicant: GEN MOTORS CORP
Inventor： SEYMOUR KATZ , FERRERO RICHARD R
IPC: G01N27/22
CPC classification number: G01N27/225
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