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发明名称
Ladder for railway car
摘要
申请公布号
US2580326(A)
申请公布日期
1951.12.25
申请号
US19470738137
申请日期
1947.03.29
申请人
STEVENS OLIVER M
发明人
STEVENS OLIVER M.
分类号
B61D23/02
主分类号
B61D23/02
代理机构
代理人
主权项
地址
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