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发明名称
IMPROVED BARRIER
摘要
申请公布号
GB8906263(D0)
申请公布日期
1989.05.04
申请号
GB19890006263
申请日期
1989.03.18
申请人
MANBY, MALCOLM
发明人
分类号
E01F13/02
主分类号
E01F13/02
代理机构
代理人
主权项
地址
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