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公开(公告)号：US1292535A
公开(公告)日：1919-01-28
申请号：US14734817
申请日：1917-02-08
Applicant: SWEETLAND ERNEST J
Inventor： SWEETLAND ERNEST J , MANNING FREDERICK W , HILPERT WILLIS S
CPC classification number: B29C70/22 , Y10T442/131
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