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公开(公告)号：US2634369A
公开(公告)日：1953-04-07
申请号：US75727447
申请日：1947-06-26
Applicant: STANDARD COIL PROD CO INC
Inventor： SWANSON GLEN E , THIAS EDWIN P
IPC: H03D3/12
CPC classification number: H03D3/12
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