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经营范围
发明名称
PROCESS FOR PREPARING LIGHTWEIGHT AGGREGATE
摘要
申请公布号
KR1019870001014(B1)
申请公布日期
1987.05.23
申请号
KR1019840002349
申请日期
1984.05.01
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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