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发明名称
AN IMPROVED METHOD OF AND MEANS FOR TEACHING THE PRONUNCIATION OF LANGUAGE
摘要
申请公布号
ZM15868(A1)
申请公布日期
1969.06.17
申请号
ZM19680000158
申请日期
1968.11.12
申请人
PITMAN I
发明人
分类号
G06K;G09B;(IPC1-7):G06K/;G09B/
主分类号
G06K
代理机构
代理人
主权项
地址
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