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发明名称
CONTROL SYSTEM FOR VARIABLE PITCH OXIAL FAN FOR UTILITY BOILER
摘要
申请公布号
KR1019810001685(B1)
申请公布日期
1981.10.27
申请号
KR1019770002929
申请日期
1977.12.15
申请人
发明人
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主分类号
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