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发明名称
摘要
申请公布号
DE2103420(A1)
申请公布日期
1971.08.05
申请号
DE19712103420
申请日期
1971.01.26
申请人
STILLIT G
发明人
分类号
G09B7/06;(IPC1-7):G09B7/06
主分类号
G09B7/06
代理机构
代理人
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