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发明名称
Railway hopper car door frame
摘要
申请公布号
US1824645(A)
申请公布日期
1931.09.22
申请号
US19280275506
申请日期
1928.05.05
申请人
WINE WILLIAM E
发明人
WINE WILLIAM E.
分类号
B61D7/16
主分类号
B61D7/16
代理机构
代理人
主权项
地址
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