Improvements relating to Manhole and like Covers and Frames,申请号GB19680001500-传众专利搜索

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发明名称	Improvements relating to Manhole and like Covers and Frames
摘要
申请公布号	GB1192321(A)	申请公布日期	1970.05.20
申请号	GB19680001500	申请日期	1968.01.10
申请人	THE DOVER ENGINEERING WORKS LIMITED	发明人	HERBERT JACK HOLDSTOCK
分类号	E02D29/14	主分类号	E02D29/14
代理机构		代理人
主权项
地址

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