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公开(公告)号：US1258777A
公开(公告)日：1918-03-12
申请号：US15278317
申请日：1917-03-06
Applicant: DUTEE W FLINT , JOHANNESSEN JOHAN E , WAAGE OSBORNE A
Inventor： JOHANNESSEN JOHAN E , WAAGE OSBORNE A
CPC classification number: F16B37/12 , Y10S411/928
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