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the magnetic carrier archives
磁性载体档案
国家机关、企事业单位在各项职能活动和社会重要公务活动中直接形成的具有保存价值的磁性载体文件。
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quaternary alloy
quaternary ammonium compound
quaternary ammonium salt
quaternary ammonium surfactants
Quaternary carbon cycle
quaternary compound
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quaternary environmental archaeology
quaternary eutectic alloy
quaternary fission
quaternary form
Quaternary geology
Quaternary glacial geomorphology
quaternary glacial period
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quaternary human
Quaternary mammalian faunas of China
quaternary market
quaternary notation
quaternary number
quaternary number system
quaternary ocean circulation
Quaternary paleoclimate
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