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发明名称
EXCAVATION METHOD
摘要
申请公布号
JPH04140393(A)
申请公布日期
1992.05.14
申请号
JP19900258980
申请日期
1990.09.28
申请人
SAN GIKEN KK
发明人
FUKUI HISAAKI
分类号
E21C37/00;B02C19/18
主分类号
E21C37/00
代理机构
代理人
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地址
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