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发明名称
摘要
申请公布号
SU557519(A1)
申请公布日期
1977.05.05
申请号
SU19752192410
申请日期
1975.10.22
申请人
发明人
分类号
G05D11/00;(IPC1-7):G05D11/00;E21C21/00
主分类号
G05D11/00
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代理人
主权项
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