An improved ventilator for roofs, walls and the like,申请号GB19640034941-传众专利搜索

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发明名称	An improved ventilator for roofs, walls and the like
摘要
申请公布号	GB1075334(A)	申请公布日期	1967.07.12
申请号	GB19640034941	申请日期	1964.08.26
申请人	WILHELM TOPP	发明人
分类号	E04D13/17;F23L17/02	主分类号	E04D13/17
代理机构		代理人
主权项
地址

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