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发明名称
PREVENTER DEVICE
摘要
申请公布号
JPH07216862(A)
申请公布日期
1995.08.15
申请号
JP19940009555
申请日期
1994.01.31
申请人
NIPPON SOIL KOGYO KK
发明人
KASHIMA SHOICHI;MURATA MINEO
分类号
E21B19/07;E02D1/00;E21B33/03;(IPC1-7):E02D1/00
主分类号
E21B19/07
代理机构
代理人
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