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公开(公告)号：US1349140A
公开(公告)日：1920-08-10
申请号：US34397319
申请日：1919-12-10
Applicant: NEWTON D BAKER
Inventor： MARTEL FRED J , ARTHUR BRIGGS CLARK , MACAULAY DOUGLAS L , WRIGHT WINTHROP R , FRANK WENNER
IPC: F41A19/05
CPC classification number: F41A19/05
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