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发明名称
ADJUSTABLE STAIR UNIT
摘要
申请公布号
GB9022391(D0)
申请公布日期
1990.11.28
申请号
GB19900022391
申请日期
1990.10.16
申请人
LIU, ING-NAN
发明人
分类号
E04F11/035
主分类号
E04F11/035
代理机构
代理人
主权项
地址
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