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发明名称
METHOD OF AND APPARATUS FOR TEACHING THE OPERATION OF A KEYBOARD CONTROLLED MACHINE OR INSTRUMENT
摘要
申请公布号
CA882823(A)
申请公布日期
1971.10.05
申请号
CAD882823
申请日期
申请人
ARTHUR R. SCHMOYER
发明人
ARTHUR R. SCHMOYER
分类号
主分类号
代理机构
代理人
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地址
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