COMPOSITE PATTERN AND METHOD FOR MAKING PRECISION SAND MOLD WITH AN INTERNAL BACK DRAFT,申请号CA19700081074-传众专利搜索

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发明名称	COMPOSITE PATTERN AND METHOD FOR MAKING PRECISION SAND MOLD WITH AN INTERNAL BACK DRAFT
摘要
申请公布号	CA921674(A)	申请公布日期	1973.02.27
申请号	CA19700081074	申请日期	1970.04.24
申请人	CATERPILLAR TRACTOR CO	发明人	HARRIS G
分类号	B22C7/00;B22C9/02;B22C9/04	主分类号	B22C7/00
代理机构		代理人
主权项
地址

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