发明名称 Device for removing stains from swimming pool walls and concrete
摘要 A cleaning tool for cleaning the walls of a swimming pool or other concrete structures. Two different sized aggregate or abrasives are combined with a binder to provide an improved cleaning device. The binder and the aggregates are matched so as to wear at substantially identical rates.
申请公布号 US5908350(A) 申请公布日期 1999.06.01
申请号 US19970861403 申请日期 1997.05.21
申请人 RALPH DALTON 发明人 WALTERS, ROY J.
分类号 A01K61/00;A47L13/10;B08B1/00;B24D15/00;E04H4/16;(IPC1-7):B24D15/00 主分类号 A01K61/00
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