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公开(公告)号：US2921036A
公开(公告)日：1960-01-12
申请号：US44756254
申请日：1954-08-03
Applicant: STANDARD COIL PROD CO INC
Inventor： FRAZIER HENRY D
IPC: H01C7/06
CPC classification number: H01C7/06
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