摘要:分析了日本LPG產(chǎn)業(yè)政策定位和運(yùn)營模式,研究了日本LPG產(chǎn)業(yè)管理、儲備政策和發(fā)展策略展望。關(guān)鍵詞:日本LPG產(chǎn)業(yè);LPG行業(yè)發(fā)展;LPG儲備Research on Operation and Development o
摘要:介紹了合肥燃?xì)饧瘓F(tuán)地理信息系統(tǒng)的發(fā)展和主要特點(diǎn)。關(guān)鍵詞:地理信息系統(tǒng);空間數(shù)據(jù)庫;解析錄入;編輯Construction Characteristics of Hefei Gas Geographic Information Sys