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公开(公告)号：US1367092A
公开(公告)日：1921-02-01
申请号：US27861519
申请日：1919-02-24
Applicant: PORTER GEORGE S
Inventor： PORTER GEORGE S
IPC: B60B31/00
CPC classification number: B60B31/005 , Y10T29/49517
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