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发明名称
Return bend
摘要
申请公布号
US1841577(A)
申请公布日期
1932.01.19
申请号
US19290392515
申请日期
1929.09.14
申请人
FANTZ FRED C
发明人
FANTZ FRED C.
分类号
F16L43/00
主分类号
F16L43/00
代理机构
代理人
主权项
地址
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