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发明名称
DRILLING APPARATUS
摘要
申请公布号
JPS63219787(A)
申请公布日期
1988.09.13
申请号
JP19870052960
申请日期
1987.03.10
申请人
ASAHI ENG KK
发明人
AKIMOTO AKIRA
分类号
E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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