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发明名称
BORING METHOD
摘要
申请公布号
JPH04101811(A)
申请公布日期
1992.04.03
申请号
JP19900219625
申请日期
1990.08.20
申请人
OOMI KOUGIYOU KK
发明人
OMI KATSUHEI
分类号
E21B25/00;B23B47/34;B23Q11/00;B28D1/14;B28D7/02;E04G23/08;E21B21/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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