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发明名称
DITCH EXCAVATION METHOD BY MAKING USE OF LIQUID JET
摘要
申请公布号
JPH04371695(A)
申请公布日期
1992.12.24
申请号
JP19910173264
申请日期
1991.06.18
申请人
ELECTRIC POWER DEV CO LTD;KAIHATSU KOJI KK;OSANAI YUTAKA;JAPAN STEEL WORKS LTD:THE
发明人
MIYANAGA YOSHIHARU;OSHITANI KOJI;YOKOTA MASAKAZU
分类号
E21B7/18;E21C37/12
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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