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发明名称
CUTTER DEVICE OF EARTH DRILL MACHINE
摘要
申请公布号
JPH06158972(A)
申请公布日期
1994.06.07
申请号
JP19920315070
申请日期
1992.11.25
申请人
HITACHI CONSTR MACH CO LTD
发明人
AJIRO SHUICHI
分类号
E21B11/00;(IPC1-7):E21B11/00
主分类号
E21B11/00
代理机构
代理人
主权项
地址
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