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发明名称
DRILLING APPARATUS
摘要
申请公布号
JPS58117195(A)
申请公布日期
1983.07.12
申请号
JP19810211656
申请日期
1981.12.28
申请人
SUMITOMO KINZOKU KOUZAN KK
发明人
TAKANO SHIYOU
分类号
E21B10/32;E21B10/34;E21B10/64
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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