山崩川竭.The mountain fell down and the river dried up.山崩切断了这个山谷与外界的联系.The slide cut off the valley from the rest of the world.山崩应归于下大雨.The heavy rain was responsible for the landslide....
介绍了美式八角锤锤体精锻成形新工艺及其预锻模结构设计要点.Title : New Process and Design of Pre - forming Die for Precision Forging U.S.锻造过程实现净形和近净形制造关键是优化预锻模的设计.The key step in flashless forging is to optimize th ed design of preform die shape....