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发明名称
CASING DEVICE FOR DRAWING IRON SCREW PILE AND METHOD OF DRAWING EXECUTION
摘要
申请公布号
JPH07331658(A)
申请公布日期
1995.12.19
申请号
JP19940145631
申请日期
1994.06.03
申请人
WAKACHIKU KENSETSU KK
发明人
MARUYAMA MASAHIRO
分类号
E21B7/18;B63B35/00;E02D5/56;E02D9/02;E21B7/20;(IPC1-7):E02D9/02
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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