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公开(公告)号：US1617651A
公开(公告)日：1927-02-15
申请号：US74935524
申请日：1924-11-11
Applicant: RUGRODEN JOHN A
Inventor： RUGRODEN JOHN A
IPC: F02P5/05
CPC classification number: F02P5/05 , Y10T74/20207 , Y10T74/2022
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