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发明名称
SCHIEBER ZUR VERANSCHAULICHUNG DER TONARTEN UND TONLEITERN.
摘要
申请公布号
DE1693169(U)
申请公布日期
1955.02.17
申请号
DE195400A5663U
申请日期
1954.06.03
申请人
DR. RER. NAT. HANS PETER APPEL
发明人
DR. RER. NAT. HANS PETER APPEL
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主分类号
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代理人
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