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公开(公告)号：US2826687A
公开(公告)日：1958-03-11
申请号：US45001054
申请日：1954-08-16
Applicant: STANDARD COIL PROD CO INC
Inventor： FISHER BERNE N
IPC: H03J5/30
CPC classification number: H03J5/30 , Y10S116/29
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