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发明名称
SMALL DIAMETER EXPANDING BIT
摘要
申请公布号
JPS60112984(A)
申请公布日期
1985.06.19
申请号
JP19830219202
申请日期
1983.11.21
申请人
TAMADA MASAYASU
发明人
TAMADA MASAYASU
分类号
E21B10/62;E21B10/32
主分类号
E21B10/62
代理机构
代理人
主权项
地址
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