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公开(公告)号：US1920888A
公开(公告)日：1933-08-01
申请号：US39648629
申请日：1929-10-01
Applicant: STANDARD IG CO
Inventor： MATHIAS PIER , WILHELM RUMPF
IPC: C10G1/06
CPC classification number: C10G1/06
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