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发明名称
ELECTROMAGNETIC PERCUSSION DEVICE
摘要
申请公布号
JPH0913869(A)
申请公布日期
1997.01.14
申请号
JP19950161024
申请日期
1995.06.27
申请人
FURUKAWA CO LTD
发明人
FUKUDA HIDEJI
分类号
E21B1/22;E21B1/00;(IPC1-7):E21C3/16
主分类号
E21B1/22
代理机构
代理人
主权项
地址
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