Air-pipe couplings,申请号GB19510001939-传众专利搜索

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发明名称	Air-pipe couplings
摘要
申请公布号	GB683259(A)	申请公布日期	1952.11.26
申请号	GB19510001939	申请日期	1951.01.25
申请人	JOSEF BRAND;CAMPBELL RITCHIE	发明人
分类号	E21F1/06;F16L17/04	主分类号	E21F1/06
代理机构		代理人
主权项
地址

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