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公开(公告)号：US3507615A
公开(公告)日：1970-04-21
申请号：US3507615D
申请日：1967-01-30
Applicant: TOA NENRYO KOGYO KK
Inventor： USAMI SEIJI , NISHIMURA KOTARO , KOGA YUZO
IPC: C01G45/04
CPC classification number: C01G45/04
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