The problem of synchrodrive for gantry-moving milling machines is researched, and two linear motors as traversing drive mechanism of gantries are applied.

针对龙门移动式镗铣床同步伺服问了研究,并用两台直线电动机作为龙门柱纵向给的传动机构。

The wavy distribution curve of precipitation formed on the longitudinal-arranged underlying rangegorge landforms.At leeside of range, dry valley formed due to fohn effect.

纵向排列的岭地形，形成明显的降水状起伏分布曲线，气流越过山岭后下沉气流带来“焚风”效应，形成干。