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发明名称
Means for backwashing a filter bed
摘要
申请公布号
US3138552(A)
申请公布日期
1964.06.23
申请号
US19610103947
申请日期
1961.04.18
申请人
RICHARDS JOHN A
发明人
RICHARDS JOHN A.
分类号
B01D29/00;B01D29/27;B01D29/60;B01D35/26;B01D36/02;B01D37/02
主分类号
B01D29/00
代理机构
代理人
主权项
地址
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