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发明名称
LOW SPECIFIC GRAVITY LIGHTWEIGHT AGGREGATE WITH COAL FLOATERS
摘要
申请公布号
KR1019950008609(B1)
申请公布日期
1995.08.03
申请号
KR1019920014202
申请日期
1992.08.07
申请人
发明人
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主分类号
代理机构
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