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公开(公告)号：US1766842A
公开(公告)日：1930-06-24
申请号：US20453127
申请日：1927-07-09
Applicant: SMITH DAVIS E
Inventor： SMITH DAVIS E
IPC: F02F3/08
CPC classification number: F02F3/08 , F05C2201/021 , F05C2201/0448
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