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公开(公告)号：US2219011A
公开(公告)日：1940-10-22
申请号：US8642636
申请日：1936-06-20
Applicant: MATERIALS REDUCTION COMPANY IN
Inventor： HAROLD KIDWELL CLEO , STEPHANOFF NICHOLAS N K
IPC: B02C19/06
CPC classification number: B02C19/063
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