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发明名称
ARTIFICIAL LIGHTWEIGHT AGGREGATE AND MANUFACTURING METHOD THEREOF
摘要
申请公布号
KR1019970008734(B1)
申请公布日期
1997.05.28
申请号
KR1019940040687
申请日期
1994.12.31
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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