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发明名称
UNDERGROUND DRILLING METHOD
摘要
申请公布号
JPS6033994(A)
申请公布日期
1985.02.21
申请号
JP19830140921
申请日期
1983.08.01
申请人
KUBOTA KENSETSU KK
发明人
ASAI MITSURU
分类号
E21D9/06
主分类号
E21D9/06
代理机构
代理人
主权项
地址
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