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公开(公告)号：US2084980A
公开(公告)日：1937-06-22
申请号：US76005934
申请日：1934-12-31
Applicant: STATE OF IOWA FOR BENEFIT OF I
Inventor： RUSSELL SWEENEY ORLAND
IPC: D21J1/00
CPC classification number: D21J1/00 , Y10S425/201
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