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retrieval route
检索途径
检索途径是信息检索的入口点,又称检索点。依据文献的外部特征(题名、责任者、出版者、出版时间等)和内容特征(分类号、主题词、关键词或自由词等)确定,是信息检索的入口点。在网络环境下,不同的检索途径往往通过相应的字段限制检索来实现。又称检索点。
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hydrofluoric
hydrofluoric acid alkylation
hydrofluorocarbon refrigerants
hydrofoil
hydrofoil craft
hydroform
hydro former
hydroforming technology
hydroformylation
hydrofracturing
hydrofracturing method
hydrofranklinite
hydrof luoric acid
hydrogel
hydrogen
hydrogen absorption/desorption plateau
hydrogen abundance
hydrogen acid
hydrogen adsorption
hydrogen adsorption storage
hydrogen and oxygen isotopes altitude effect of precipitation
hydrogen and oxygen isotopes continent effect of precipitation
hydrogen and oxygen isotopes latitude effect of precipitation
hydrogen and oxygen isotopes seasonal effects of precipitation
hydrogen and oxygen isotopes temperature effect of precipitation
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