摘要
WorkersonOctober29completedatunnelunderChina'sYangtzeRiverforamajorgaspipelinethatwillrunfromthesouthwestprovinceofSichuantoShanghaiineastChina.Withadiameterof3.08metersandalengthof1,405meters,thetunnellaidabout20metersbeneaththeriverbed,connectingtwogaswellsoneachbankoftheYang-
出版日期
2007年12月22日(中国期刊网平台首次上网日期,不代表论文的发表时间)