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经营范围
发明名称
WELL FILTER
摘要
申请公布号
PL155730(B1)
申请公布日期
1991.12.31
申请号
PL19870265658
申请日期
1987.05.11
申请人
发明人
分类号
E03B;E03B3/26;(IPC1-7):E03B3/26
主分类号
E03B
代理机构
代理人
主权项
地址
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