Undercut excavation with protection against seismic events or excessive groun movement,申请号AP19980001301-传众专利搜索

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发明名称	Undercut excavation with protection against seismic events or excessive groun movement
摘要
申请公布号	AP9801301(D0)	申请公布日期	1998.09.30
申请号	AP19980001301	申请日期	1998.04.14
申请人	ONTARIO INC.	发明人
分类号	E02D17/00;E02D27/34;E02D29/045	主分类号	E02D17/00
代理机构		代理人
主权项
地址

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