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发明名称
Downspout strainer
摘要
申请公布号
US2446256(A)
申请公布日期
1948.08.03
申请号
US19460707669
申请日期
1946.11.04
申请人
YOUNG JOHN C
发明人
YOUNG JOHN C.
分类号
E04D13/08;F16L55/24
主分类号
E04D13/08
代理机构
代理人
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地址
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