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发明名称
METHOD OF EXCAVATING VERTICAL HOLE
摘要
申请公布号
JPS53146406(A)
申请公布日期
1978.12.20
申请号
JP19770062018
申请日期
1977.05.27
申请人
KAJIMA CORP
发明人
TSUKUMO TAKAYO;SATOU HISASHI;YOSHINO YUUICHI
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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