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公开(公告)号：US2971355A
公开(公告)日：1961-02-14
申请号：US81012259
申请日：1959-04-30
Applicant: NAT COMPANY INC
Inventor： WALSH JOHN A
CPC classification number: F16B2/246 , F16B7/0426 , F16D1/104 , Y10T403/7152 , Y10T403/7158 , Y10T403/7171 , Y10T403/7176
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