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发明名称
Railway car hopper door
摘要
申请公布号
US1813548(A)
申请公布日期
1931.07.07
申请号
US19290398624
申请日期
1929.10.10
申请人
UNION METAL PRODUCTS COMPANY
发明人
SMALL ARTHUR E.
分类号
B61D7/18
主分类号
B61D7/18
代理机构
代理人
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地址
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