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发明名称
STEEL SQUARE SET LINING
摘要
申请公布号
PL139773(B1)
申请公布日期
1987.02.28
申请号
PL19830242632
申请日期
1983.06.20
申请人
发明人
分类号
E21D;E21D11/10;E21D11/18;(IPC1-7):E21D11/18
主分类号
E21D
代理机构
代理人
主权项
地址
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