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发明名称
A PRESSURE BALANCED TORSION SYSTEM FOR A BACKREST AND THE LIKE
摘要
申请公布号
EP0553318(B1)
申请公布日期
1997.05.07
申请号
EP19920915852
申请日期
1992.07.23
申请人
ZHANG, YUN HUI
发明人
ZHANG, YUN HUI
分类号
A47C7/34;A47C7/24;A47C23/00;(IPC1-7):A47C7/24
主分类号
A47C7/34
代理机构
代理人
主权项
地址
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