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发明名称
Adjustable stair tread/riser units
摘要
申请公布号
GB2225357(A)
申请公布日期
1990.05.30
申请号
GB19880023999
申请日期
1988.10.13
申请人
* JOHN BENNETT ARCHITECTURE LIMITED
发明人
JOHN L * BENNETT
分类号
E04F11/025;E04F11/112
主分类号
E04F11/025
代理机构
代理人
主权项
地址
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