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摘要
申请公布号
SU50868(A1)
申请公布日期
1936.11.30
申请号
SU19360197822
申请日期
1936.07.13
申请人
STEPANOV V.P.
发明人
STEPANOV V.P.
分类号
G11B15/295;G11B15/70
主分类号
G11B15/295
代理机构
代理人
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