Improvements relating to gas-conveying ducts,申请号GB19490007982-传众专利搜索

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发明名称	Improvements relating to gas-conveying ducts
摘要
申请公布号	GB661775(A)	申请公布日期	1951.11.28
申请号	GB19490007982	申请日期	1949.03.24
申请人	LEONARD GORDON DAVIES	发明人
分类号	F16L43/00	主分类号	F16L43/00
代理机构		代理人
主权项
地址

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