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1.发明授权
公开(公告)号：US2182519A
公开(公告)日：1939-12-05
申请号：US10351836
申请日：1936-10-01
Applicant: HOOF PRODUCTS COMPANY
Inventor： HANDY ROBERT G , SEYMOUR CLAYTON B , ALTENBERG ALFONS A
IPC: G01N3/00
CPC classification number: G01N3/00 , G01N2203/021 , G01N2203/0292
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