METHOD FOR DETERMINING SOUND FOCUS FOR MINING BLAST,申请号CAD817648-传众专利搜索

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发明名称	METHOD FOR DETERMINING SOUND FOCUS FOR MINING BLAST
摘要
申请公布号	CA817648(A)	申请公布日期	1969.07.15
申请号	CAD817648	申请日期
申请人	OGLEBAY NORTON COMPANY	发明人	WALLACE G. FETZER
分类号		主分类号
代理机构		代理人
主权项
地址

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