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公开(公告)号：US1384091A
公开(公告)日：1921-07-12
申请号：US44969721
申请日：1921-03-05
Applicant: FOSTER MERRIAM AND COMPANY
Inventor： BOWNTREE FRANK L
IPC: B60B33/00
CPC classification number: B60B33/0002 , Y10T16/202
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