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发明名称
Perfectionnements aux revêtements de soutien pour tunnels
摘要
申请公布号
FR1382589(A)
申请公布日期
1964.12.18
申请号
FR19640963645
申请日期
1964.02.13
申请人
COLIN SWALLOW (MINING) LIMITED
发明人
分类号
E21D11/26
主分类号
E21D11/26
代理机构
代理人
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