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发明名称
METHOD OF BORING HOLE OF DIFFERENT DIAMETERS IN CONCRETE* ROCK BED* ETC*
摘要
申请公布号
JPS5286902(A)
申请公布日期
1977.07.20
申请号
JP19760003881
申请日期
1976.01.16
申请人
HIRATA YUKIO
发明人
HIRATA YUKIO
分类号
E21B10/00
主分类号
E21B10/00
代理机构
代理人
主权项
地址
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