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公开(公告)号：DE1675482A1
公开(公告)日：1971-01-07
申请号：DE1675482
申请日：1968-02-29
Applicant: BASF AG
Inventor： PETRI DR NORBERT , STUEBER DIPL-ING GEORG , BRAND UWE
IPC: F16K3/18
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