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发明名称
GROUND BORING METHOD AND DEVICE THEREFOR
摘要
申请公布号
JPH04312693(A)
申请公布日期
1992.11.04
申请号
JP19910105200
申请日期
1991.04.11
申请人
OHBAYASHI CORP
发明人
TOSAKA TOMOHEI;HANIYUDA KICHIYA;TSUSHIMA SHOICHI
分类号
E21B21/14;E21B21/00
主分类号
E21B21/14
代理机构
代理人
主权项
地址
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