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发明名称
摘要
申请公布号
SU551427(A1)
申请公布日期
1977.03.25
申请号
SU19762317286
申请日期
1976.01.23
申请人
发明人
分类号
E02D7/18;(IPC1-7):E02D7/18
主分类号
E02D7/18
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