Improvements in or relating to the purification of silica sand,申请号GB19400002923-传众专利搜索

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发明名称	Improvements in or relating to the purification of silica sand
摘要
申请公布号	GB535455(A)	申请公布日期	1941.04.09
申请号	GB19400002923	申请日期	1940.02.15
申请人	RICHARD TODD HANCOCK	发明人
分类号	C03C1/02	主分类号	C03C1/02
代理机构		代理人
主权项
地址

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