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发明名称
Railroad box car ceiling construction
摘要
申请公布号
US2273654(A)
申请公布日期
1942.02.17
申请号
US19400335297
申请日期
1940.05.15
申请人
NYSTROM KARL F
发明人
NYSTROM KARL F.
分类号
B61D17/12
主分类号
B61D17/12
代理机构
代理人
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