In order to meet the need of freight, a factory developed 370t center-depressed flatcar which is the biggest domestic load-carrying capacity, the maximum load bearing surfaces and the smallest dead weight coefficient in the great tonnage center-depressed flatcar. 为了满足货物运输的需要,某厂最新研制了目前国内载重量最大、承载面最长且在大吨位凹底车中自重系数最小的370t凹底车。