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经营范围
发明名称
NONCORE DIAMOND BIT
摘要
申请公布号
JPH03129086(A)
申请公布日期
1991.06.03
申请号
JP19890266043
申请日期
1989.10.12
申请人
TONE BORING CO
发明人
SATO TOSHIHIKO
分类号
E21B10/00;E21B10/08;E21B10/46
主分类号
E21B10/00
代理机构
代理人
主权项
地址
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