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发明名称
METHOD OF PREPARING POLYISOCYANATE THAT HAS CIRCULAR FOAMS
摘要
申请公布号
KR1019810000813(B1)
申请公布日期
1981.07.08
申请号
KR1019750002308
申请日期
1975.10.27
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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