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发明名称
DRILLING APPARATUS
摘要
申请公布号
JPS5824088(A)
申请公布日期
1983.02.12
申请号
JP19810122303
申请日期
1981.08.04
申请人
YAMAMOTO TEKKOSHO:KK
发明人
HAGA KAZUO
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
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地址
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