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发明名称
Sand screen
摘要
申请公布号
US1785161(A)
申请公布日期
1930.12.16
申请号
US19280312449
申请日期
1928.10.15
申请人
WANGELIN WALTER H
发明人
WANGELIN WALTER H.
分类号
B22C5/02;B22C5/06
主分类号
B22C5/02
代理机构
代理人
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地址
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