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公开(公告)号：US3434104A
公开(公告)日：1969-03-18
申请号：US3434104D
申请日：1967-08-10
Applicant: MANDREL INDUSTRIES
Inventor： STAPLETON FRED E , BUESCHER JAMES E
CPC classification number: H01B7/12 , G01V1/201 , G01V1/3817
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