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发明名称
Hopper door
摘要
申请公布号
US1850361(A)
申请公布日期
1932.03.22
申请号
US19310538060
申请日期
1931.05.18
申请人
UNION METAL PRODUCTS COMPANY
发明人
SWANN JAMES S.
分类号
B61D7/18
主分类号
B61D7/18
代理机构
代理人
主权项
地址
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