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发明名称
RAIL HOLE OPENING AUXILIARY DEVICE
摘要
申请公布号
JPH09316803(A)
申请公布日期
1997.12.09
申请号
JP19960131701
申请日期
1996.05.27
申请人
NISHI NIPPON KENSETSU KK
发明人
KOTO SADAHIRO
分类号
E01B31/06;B23Q3/18;(IPC1-7):E01B31/06
主分类号
E01B31/06
代理机构
代理人
主权项
地址
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