杭州市管道燃气安全运行的对策研究 ——市区管道燃气安全事故预防 The Prevention Focus on Urban Pipeline Gas Accident in Hangzhou Hangzhou Public Utilities Regulatory Center Xia Yinglan Wei Yongwen Abstract ：The problems of pipeline gas safe operation in Hangzhou are analyzed, presented by technology, system integration, etc. in order to establish effective mechanisms for the safe operation of pipeline gas ， thereby reducing