Improvements in and relating to pneumatic stoppers for gas mains,申请号GB19390028159-传众专利搜索

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发明名称	Improvements in and relating to pneumatic stoppers for gas mains
摘要
申请公布号	GB533206(A)	申请公布日期	1941.02.07
申请号	GB19390028159	申请日期	1939.10.18
申请人	JOHAN NICOLAAS BLAAUW	发明人
分类号	F16K7/10	主分类号	F16K7/10
代理机构		代理人
主权项
地址

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