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发明名称	CULVERT HEAD WALL STRUCTURE
摘要
申请公布号	CA371220(A)	申请公布日期	1938.01.11
申请号	CAD371220	申请日期
申请人	PERCY E. HOAK	发明人	PERCY E. HOAK
分类号		主分类号
代理机构		代理人
主权项
地址

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