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发明名称
Counterbalance device
摘要
申请公布号
US2123676(A)
申请公布日期
1938.07.12
申请号
US19370154746
申请日期
1937.07.21
申请人
THE NATIONAL SUPPLY COMPANY
发明人
HILL ROWLAND F.
分类号
F04B47/14
主分类号
F04B47/14
代理机构
代理人
主权项
地址
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