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发明名称
摘要
申请公布号
BE720774(A)
申请公布日期
1969.03.13
申请号
BED720774
申请日期
1968.09.13
申请人
发明人
分类号
H03B1/00;H03B1/04;H03B21/02;H03D7/16
主分类号
H03B1/00
代理机构
代理人
主权项
地址
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