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公开(公告)号：US1520418A
公开(公告)日：1924-12-23
申请号：US48279321
申请日：1921-07-06
Applicant: HURLBUT HENRY A
Inventor： HURLBUT HENRY A
IPC: F03G1/08
CPC classification number: F03G1/08 , Y10T74/19828
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