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公开(公告)号：EP0351432A4
公开(公告)日：1991-01-30
申请号：EP88903961
申请日：1988-05-02
Applicant: O.C. ENGINEERING CO. LTD.
Inventor： SERIZAWA, YOSHIKIYO , YAMOTO, TAKUO
IPC: C01B13/11
CPC classification number: C01B13/11 , C01B2201/22 , C01B2201/62 , Y10S422/907
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