Apparatus for producing light aggregates,申请号US19300452441-传众专利搜索

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发明名称	Apparatus for producing light aggregates
摘要
申请公布号	US1805020(A)	申请公布日期	1931.05.12
申请号	US19300452441	申请日期	1930.05.14
申请人	INDUSTRIAL SILICA CORPORATION	发明人	SMITH HARRY H.
分类号	C04B20/06	主分类号	C04B20/06
代理机构		代理人
主权项
地址

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