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发明名称
Drainage device
摘要
申请公布号
US2121613(A)
申请公布日期
1938.06.21
申请号
US19370162091
申请日期
1937.09.02
申请人
FRITZ SCHULTZ
发明人
SCHULTZ FRITZ
分类号
E04D13/04
主分类号
E04D13/04
代理机构
代理人
主权项
地址
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