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经营范围
发明名称
SHAFT DRILLING MACHINE
摘要
申请公布号
JPH06146764(A)
申请公布日期
1994.05.27
申请号
JP19920294674
申请日期
1992.11.04
申请人
OHBAYASHI CORP;HITACHI ZOSEN CORP
发明人
SAKAMOTO HIROSHI;TAKEDA KUNIO;TANAKA KIICHIROU;ASADA KENJI;SATO JOJI
分类号
E21B7/20;E21B4/18;E21D1/03;(IPC1-7):E21B7/20
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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