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发明名称
摘要
申请公布号
NL7001403(A)
申请公布日期
1970.08.10
申请号
NL19700001403
申请日期
1970.01.30
申请人
发明人
分类号
H03D1/22;(IPC1-7):H04H5/00
主分类号
H03D1/22
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