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发明名称
摘要
申请公布号
CH601566(A5)
申请公布日期
1978.07.14
申请号
CH19760012157
申请日期
1976.09.24
申请人
MINISTERIUM FUER VERKEHRSWESEN
发明人
HELMUT PILZECKER
分类号
E01B31/17;(IPC1-7):E01B31/17
主分类号
E01B31/17
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