THRUST RING FOR TUNNELING MACHINE,申请号KR20030082787-传众专利搜索

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发明名称	THRUST RING FOR TUNNELING MACHINE
摘要
申请公布号	KR100819320(B1)	申请公布日期	2008.04.02
申请号	KR20030082787	申请日期	2003.11.20
申请人		发明人
分类号	E21B7/00	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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