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发明名称
Jack
摘要
申请公布号
US1890144(A)
申请公布日期
1932.12.06
申请号
US19300427091
申请日期
1930.02.10
申请人
BEST NORMAN A
发明人
BEST NORMAN A.
分类号
B66F3/08;B66F3/16
主分类号
B66F3/08
代理机构
代理人
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