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发明名称
Magnetic recording machine
摘要
申请公布号
US2335277(A)
申请公布日期
1943.11.30
申请号
US19400362754
申请日期
1940.10.25
申请人
HELLER HERMAN S
发明人
HELLER HERMAN S.
分类号
G11B5/00
主分类号
G11B5/00
代理机构
代理人
主权项
地址
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