Improvements in or relating to manhole frames,申请号GB19460008099-传众专利搜索

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发明名称	Improvements in or relating to manhole frames
摘要
申请公布号	GB609470(A)	申请公布日期	1948.09.30
申请号	GB19460008099	申请日期	1946.03.15
申请人	GEORGE BASIL JONES	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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