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公开(公告)号：WO1990015773A1
公开(公告)日：1990-12-27
申请号：PCT/US1990003449
申请日：1990-06-18
Applicant: SPARTON CORPORATION
Inventor： SPARTON CORPORATION , BRITT, Donald, R. , REMPINSKI, Donald, R. , LIVSHITS, Mikhail , SOVIS, David, M.
IPC: B66D01/00
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