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发明名称
Power lift
摘要
申请公布号
US2856156(A)
申请公布日期
1958.10.14
申请号
US19560596279
申请日期
1956.07.06
申请人
YOUNG GEORGE F
发明人
YOUNG GEORGE F.
分类号
B66C13/18;E21B19/087
主分类号
B66C13/18
代理机构
代理人
主权项
地址
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