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发明名称
PHONOGRAPH RECORD
摘要
申请公布号
CA371462(A)
申请公布日期
1938.01.25
申请号
CAD371462
申请日期
申请人
CARBIDE AND CARBON CHEMICALS LIMITED
发明人
RICHARD F. WARREN
分类号
主分类号
代理机构
代理人
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