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1.发明授权
公开(公告)号：US3048716A
公开(公告)日：1962-08-07
申请号：US5330460
申请日：1960-08-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： SELEY ELDON L , STONE JR RICHARD C
IPC: H03K19/09
CPC classification number: H03K19/09
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