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发明名称
摘要
申请公布号	JP2002544098(A)	申请公布日期	2002.12.24
申请号	JP20000618195	申请日期	2000.05.17
申请人		发明人
分类号	E21B11/04;B66C13/08;B66C23/00;B66C23/18;B66C23/20;G21C19/32;(IPC1-7):B66C23/00	主分类号	E21B11/04
代理机构		代理人
主权项
地址

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