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1.发明专利
公开(公告)号：CH325785A
公开(公告)日：1957-11-30
申请号：CH325785D
申请日：1953-10-29
Applicant: BASF AG
Inventor： DIPL-ING UNTERSTENHOEFER LEO D , WILHELM KRIEGER
IPC: F23D17/00
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