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发明名称
APPARATUS FOR PREVENTING FLOWING BACKWARD OF DUST IN DUST CHAMBER OF VACUUM CLEANER
摘要
申请公布号
KR1019960007462(B1)
申请公布日期
1996.06.03
申请号
KR1019940018747
申请日期
1994.07.29
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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