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发明名称
METHOD FOR CONTROLLING SPECIFIC GRAVITY OF POLYSTYRENE-FOAM PARTICLE
摘要
申请公布号
KR1019910007999(B1)
申请公布日期
1991.10.05
申请号
KR1019890011010
申请日期
1989.08.01
申请人
发明人
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主分类号
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