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发明名称
Cushion-back dipper
摘要
申请公布号
US1766255(A)
申请公布日期
1930.06.24
申请号
US19270189121
申请日期
1927.05.05
申请人
AMERICAN MANGANESE STEEL COMPANY
发明人
MULLALLY WALTER J.
分类号
E02F3/36
主分类号
E02F3/36
代理机构
代理人
主权项
地址
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