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发明名称
Staircase
摘要
申请公布号
GB9415639(D0)
申请公布日期
1994.09.21
申请号
GB19940015639
申请日期
1994.08.03
申请人
BOYLE, SEAN T
发明人
分类号
E04F11/038
主分类号
E04F11/038
代理机构
代理人
主权项
地址
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