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发明名称
IMPROVEMENTS IN BARRIERS
摘要
申请公布号
ZA7004747(B)
申请公布日期
1972.04.26
申请号
ZA19700004747
申请日期
1972.02.03
申请人
KNOTT N
发明人
KNOTT N
分类号
E06B
主分类号
E06B
代理机构
代理人
主权项
地址
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