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发明名称
Retractable emergency crash bollard
摘要
申请公布号
HK1082893(A2)
申请公布日期
2006.06.16
申请号
HK20060102679
申请日期
2006.03.01
申请人
THE HONG KONG POLYTECHNIC UNIVERSITY
发明人
MICHAEL SIU KIN WAI
分类号
(IPC1-7):E01F
主分类号
(IPC1-7):E01F
代理机构
代理人
主权项
地址
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