Clothing . clothing accessories . 2 and 4 hole buttons . diameters and centre - to - centre distances between the holes 服裝業(yè).服飾品.眼或眼扣.眼之間的中心距離和直徑
Among railway line ' s plane design parameter , the minimum radius of curve , transition curve ' s type and length , straight line between two curves , centre - to - centre distance of track are key factors which confine railway to bringing up speed , moreover these factors among maglev railway request even more strict 由于高速磁懸浮鐵路采用了非接觸式的行車技術(shù),舒適性將得到很好的改善。鐵路線路平面設(shè)計參數(shù)中,最小曲線半徑、緩和曲線長度、夾直線長度、線間距離是限制列車速度的關(guān)鍵因素,高速磁浮鐵路同樣如此。