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经营范围
发明名称
Counterbalancing device
摘要
申请公布号
US2082761(A)
申请公布日期
1937.06.01
申请号
US19270167924
申请日期
1927.02.14
申请人
THE INTERNATIONAL DERRICK & EQUIPMENT COMPANY
发明人
BLOSS RICHARD R.;PFEIL ROY C.
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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