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发明名称
ARRANGEMENT AND METHOD OF INSTALLING A LINE ALONG AN UNDERGROUND ARC WAY
摘要
申请公布号
YU183175(A)
申请公布日期
1982.02.28
申请号
YU19750001831
申请日期
1975.07.18
申请人
TDRIL CORP
发明人
SHERINGTON M.D.
分类号
E21B7/04;E21B7/28;E21B21/00;E21D9/08;H02G1/06;(IPC1-7):H02G1/00
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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