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发明名称
IMPROVEMENTS IN CONSTRUCTION OF BUILDING MATERIALS
摘要
申请公布号
KR1019850001932(B1)
申请公布日期
1985.12.31
申请号
KR1019800004263
申请日期
1980.11.06
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
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