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发明名称
STRETCHING METHOD AND APPTS. FOR POLYETHYLENE TUBE FILM
摘要
申请公布号
KR1019890002540(B1)
申请公布日期
1989.07.18
申请号
KR1019860006974
申请日期
1986.08.22
申请人
发明人
分类号
主分类号
代理机构
代理人
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