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发明名称
Return bend
摘要
申请公布号
US1752331(A)
申请公布日期
1930.04.01
申请号
US19290352780
申请日期
1929.04.05
申请人
FANTZ FRED C
发明人
FANTZ FRED C.
分类号
F16L43/00;F16L45/00
主分类号
F16L43/00
代理机构
代理人
主权项
地址
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