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公开(公告)号:US1327117A
公开(公告)日:1920-01-06
申请号:US27751519
申请日:1919-02-17
Applicant: ALEXANDER J BOYD
Inventor: SMITH JOHN F
IPC: B01J7/02 , C10J1/02
CPC classification number: C10J1/02 , B01J7/02