Improvements in or relating to manhole and like covers, gulley grids and the like and frames therefor,申请号GB19300006154-传众专利搜索

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发明名称	Improvements in or relating to manhole and like covers, gulley grids and the like and frames therefor
摘要
申请公布号	GB349465(A)	申请公布日期	1931.05.26
申请号	GB19300006154	申请日期	1930.02.25
申请人	PERCY MARTIN WATTS	发明人
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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