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发明名称
摘要
申请公布号
SU495429(A1)
申请公布日期
1975.12.15
申请号
SU19731963195
申请日期
1973.10.08
申请人
发明人
分类号
(IPC1-7):E04C2/46
主分类号
(IPC1-7):E04C2/46
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