纵向进给 meaning in Chinese

length feed
long feed
longitudinal feed
traversing feed

The automobile outline size - measuring machine is four meters in the width and height direction and the dragon gate type frame structure . the distance of movement in the perpendicular direction is 20 meters . small moving vehicles driven by step motor move along a track synchronously
汽车轮廓尺寸测量机为一宽度、高度均为4m的龙门式构架结构,其纵向进给长度为20m ;由步进电机驱动移动龙门架小车沿同步导轨运动。