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发明名称
IMPROVEMENTS RELATING TO TUNNELLING APPARATUS
摘要
申请公布号
GB1237129(A)
申请公布日期
1971.06.30
申请号
GB19680020323
申请日期
1968.04.29
申请人
WILLIAM SMITH
发明人
WILLIAM SMITH
分类号
E21D9/08
主分类号
E21D9/08
代理机构
代理人
主权项
地址
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