span形容词

形容词是span表示巨大，巨大的跨度，例如：

1.A novel structure for ultra long span optical transmission systems is proposed.提出一种用于超长跨距无中继光传输系统的结构。

2.Discussion on the Design of Large Span Sinking Platform.大跨距凿井平台的设计探讨。

3.Mechanical Calculation of Self Supporting Overhead Optical Cable for a Big Span.大跨距条件下自承式架空光缆的力学计算。