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发明名称
Jack
摘要
申请公布号
US2891765(A)
申请公布日期
1959.06.23
申请号
US19550548867
申请日期
1955.11.25
申请人
PEARNE FRANK S
发明人
PEARNE FRANK S.
分类号
B66F3/24;B66F5/04
主分类号
B66F3/24
代理机构
代理人
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