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公开(公告)号：US3292131A
公开(公告)日：1966-12-13
申请号：US33205963
申请日：1963-12-20
Applicant: WILLIAM J SMITH
Inventor： PORCH DOUGLAS E
CPC classification number: H05K3/4046 , H05K1/0298 , H05K2201/10303 , H05K2201/10333
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