Improvements in or relating to ducting,申请号GB19540033053-传众专利搜索

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发明名称	Improvements in or relating to ducting
摘要
申请公布号	GB782429(A)	申请公布日期	1957.09.04
申请号	GB19540033053	申请日期	1954.11.15
申请人	THE CEMENTATION COMPANY LIMITED	发明人	BROWN WILLIAM DOUGLAS;CHAMPION STEWART
分类号	E21F1/04;E21F1/06	主分类号	E21F1/04
代理机构		代理人
主权项
地址

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