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1.发明专利
公开(公告)号：CH508258A
公开(公告)日：1971-05-31
申请号：CH858870
申请日：1970-06-08
Applicant: BASF AG
Inventor： ROBERT SCHINDLER , KURT SCHMIDTS , WOLFGANG WIEGEL
IPC: G03B21/32 , G11B23/02 , G11B23/023 , B65D85/67
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