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发明名称
DRILLING TOOL
摘要
申请公布号
JPH04169692(A)
申请公布日期
1992.06.17
申请号
JP19900297947
申请日期
1990.11.02
申请人
MITSUBISHI MATERIALS CORP
发明人
ISHIMATSU TOSHIKI;KIMURA TAKUMI
分类号
E21B10/32;E21B4/06;E21B10/38;E21B10/60
主分类号
E21B10/32
代理机构
代理人
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地址
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