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公开(公告)号：US3464022A
公开(公告)日：1969-08-26
申请号：US3464022D
申请日：1967-08-30
Applicant: MANDREL INDUSTRIES
Inventor： LOCHEED EDWARD W JR , SHEFFIELD HERMAN E
CPC classification number: H03G3/3026 , G01V1/245
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