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发明名称
Door counterbalancing structure
摘要
申请公布号
US1861277(A)
申请公布日期
1932.05.31
申请号
US19290391950
申请日期
1929.09.11
申请人
GENERAL ELECTRIC COMPANY
发明人
KJOLSETH OLE K.
分类号
B61C17/02
主分类号
B61C17/02
代理机构
代理人
主权项
地址
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