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发明名称
Steerable tunnel-drilling machine
摘要
申请公布号
US3295892(A)
申请公布日期
1967.01.03
申请号
US19640355775
申请日期
1964.03.30
申请人
JAMES S. ROBBINS AND ASSOCIATES, INC.
发明人
WINBERG DOUGLAS F.;GALGOCZY JOHN
分类号
E21D9/10
主分类号
E21D9/10
代理机构
代理人
主权项
地址
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