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公开(公告)号：US2883293A
公开(公告)日：1959-04-21
申请号：US66498357
申请日：1957-06-11
Applicant: SERVO CORP OF AMERICA
Inventor： JERGER JR JOSEPH , MCKENNA JOHN F
IPC: C03C3/32
CPC classification number: C03C3/321 , Y10S501/904
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