Improvements relating to manhole doors and manholes,申请号GB19410010281-传众专利搜索

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发明名称	Improvements relating to manhole doors and manholes
摘要
申请公布号	GB546071(A)	申请公布日期	1942.06.25
申请号	GB19410010281	申请日期	1941.08.13
申请人	RICHARD SHENTON	发明人
分类号	B63B19/14	主分类号	B63B19/14
代理机构		代理人
主权项
地址

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