Sewage sludge treatment,申请号US19310506293-传众专利搜索

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发明名称	Sewage sludge treatment
摘要
申请公布号	US1997252(A)	申请公布日期	1935.04.09
申请号	US19310506293	申请日期	1931.01.02
申请人	THE DORR COMPANY, INC.	发明人	FISCHER ANTHONY J.
分类号	C02F3/28	主分类号	C02F3/28
代理机构		代理人
主权项
地址

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