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发明名称
Window-sash balance
摘要
申请公布号
US1795561(A)
申请公布日期
1931.03.10
申请号
US19280290571
申请日期
1928.07.05
申请人
发明人
KERR JOHN F.
分类号
E05D13/00
主分类号
E05D13/00
代理机构
代理人
主权项
地址
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