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经营范围
发明名称
UNDERGROUND DRILLING
摘要
申请公布号
JPS56153096(A)
申请公布日期
1981.11.26
申请号
JP19800056976
申请日期
1980.04.28
申请人
SEYA MINORU
发明人
SEYA MINORU
分类号
E21D9/08
主分类号
E21D9/08
代理机构
代理人
主权项
地址
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