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公开(公告)号：US1402195A
公开(公告)日：1922-01-03
申请号：US32424219
申请日：1919-09-16
Applicant: NEWTON D BAKER
Inventor： TRUMBULL HARLAN L , EVANS WILLIAM L
IPC: C09B11/12
CPC classification number: C09B11/12
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