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发明名称
EXCAVATION DEVICE
摘要
申请公布号
JPH0414593(A)
申请公布日期
1992.01.20
申请号
JP19900119070
申请日期
1990.05.08
申请人
OHORI MASATO
发明人
OHORI MASATO
分类号
E21B15/00;E21D7/00
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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