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公开(公告)号：US1333895A
公开(公告)日：1920-03-16
申请号：US32307719
申请日：1919-09-11
Applicant: GEORGE BOTTS
Inventor： GEORGE BOTTS
IPC: B60B33/08
CPC classification number: B60B33/08 , Y10T16/1889 , Y10T16/201
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