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发明名称
Drainage system
摘要
申请公布号
US2482673(A)
申请公布日期
1949.09.20
申请号
US19480003710
申请日期
1948.01.22
申请人
WALTER KJELLMAN
发明人
KJELLMAN WALTER
分类号
E02B11/00
主分类号
E02B11/00
代理机构
代理人
主权项
地址
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