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发明名称
METHOD OF FORMING MULTI-LAYER CONCRETE LINING OF SHAFTS KREPI
摘要
申请公布号
PL119006(B2)
申请公布日期
1981.11.30
申请号
PL19790214392
申请日期
1979.03.26
申请人
发明人
分类号
E21D;E21D5/04;(IPC1-7):E21D5/04
主分类号
E21D
代理机构
代理人
主权项
地址
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