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发明名称
Lernmittel für den naturwissenschaftlichen Unterricht.
摘要
申请公布号
CH199503(A)
申请公布日期
1938.08.31
申请号
CHD199503
申请日期
1938.01.14
申请人
FROEHLICH WILHELM
发明人
WILHELM FROEHLICH
分类号
G09B1/00
主分类号
G09B1/00
代理机构
代理人
主权项
地址
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