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发明名称
METHOD FOR PREPARING GROOVED SHEET MATERIAL
摘要
申请公布号
KR1019800001429(B1)
申请公布日期
1980.12.05
申请号
KR1019750000262
申请日期
1975.02.10
申请人
发明人
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主分类号
代理机构
代理人
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