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发明名称
摘要
申请公布号
SU511413(A1)
申请公布日期
1976.04.25
申请号
SU19731910266
申请日期
1973.04.20
申请人
发明人
分类号
E04C2/28;(IPC1-7):E04C2/28
主分类号
E04C2/28
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代理人
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地址
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