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发明名称
ENLARGING TUNNEL
摘要
申请公布号
GB8329659(D0)
申请公布日期
1983.12.07
申请号
GB19830029659
申请日期
1983.11.07
申请人
MITSUI KENSETSU KK
发明人
分类号
E21D9/06;E21D9/00;E21D9/10;E21D11/04;E21D13/00;(IPC1-7):E21D9/06
主分类号
E21D9/06
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代理人
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