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经营范围
发明名称
Autoamtic counterbalancing system
摘要
申请公布号
US2910335(A)
申请公布日期
1959.10.27
申请号
US19570693696
申请日期
1957.10.31
申请人
WALES NATHANIEL B
发明人
WALES NATHANIEL B.
分类号
A47B51/00
主分类号
A47B51/00
代理机构
代理人
主权项
地址
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