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发明名称
EXCAVATING METHOD AND DEVICE BY USE OF CUTTING BIT
摘要
申请公布号
JPH10140959(A)
申请公布日期
1998.05.26
申请号
JP19960318495
申请日期
1996.11.15
申请人
TETRA CO LTD;ASAHI ENG KK;MITSUBISHI MATERIALS CORP
发明人
KOBAYASHI KAZUMITSU;MATSUOKA MICHIO;OKANO NAOJI;TAKEUCHI SEIICHI;SAKURADA MINORU;HAYASHI TAKESHI;SABURI AKIHIRO;TOFUN KAZUO
分类号
E21B7/20;E21B10/32;E21B10/44;(IPC1-7):E21B10/32
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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