Huang Hechang 5464 km, cathay Pacific ship, we sat on the visit of the three gorges project, the Yellow River three gorges first valley called lone.
黄河长5464千米，出国留学网坐上国泰号游船，游览黄河三峡的第一道峡谷叫孤三峡。
Taking the project of Ren Hechang shallow tunnel in Yuhuai railway as the background, the field experiments of the vibration effects of the ground in tunnel blasting have been done.
以渝怀铁路人和场浅埋隧道工程为背景，进行掘进爆破的地表震动效应试验。
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