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公开(公告)号：US2913674A
公开(公告)日：1959-11-17
申请号：US48854555
申请日：1955-02-16
Applicant: STANDARD COIL PROD CO INC
Inventor： BULLARD RICHARD L , ERDMAN KENNETH D
IPC: H03B23/00
CPC classification number: H03B23/00
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