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公开(公告)号：US1694057A
公开(公告)日：1928-12-04
申请号：US15055626
申请日：1926-11-24
Applicant: MCFARLAN COLE ROBERT
Inventor： MCFARLAN COLE ROBERT
CPC classification number: C09B11/12 , B01J2219/00094 , C09B11/04
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