span length [建] 跨长 ; 跨间距离
critical span length 临界跨距
shear span length 剪跨长度
bridge span length 桥梁跨径
minimum span length 最小跨度
There is the danger that the high-speed connectivity of the Internet will reduce our attention span—that we will be incapable of reading anything of length or which requires deep concentration.
风险在于，互联网的高速连接会减少我们的注意力持续时间，从而导致我们不能阅读长篇论著，或是需要高度集中注意力的书籍。
In this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.
分析齿轮主要参数，提出用测量跨棒（）和公法线长度计算斜齿圆柱齿轮螺旋角的测绘方法，并推导出螺旋角的计算公式。
The calculation models of curved beam Bridges with same span length, but different curvature radius, center angles and supporting forms are established by means of finite element software.
利用有限元软件，建立了跨径相同、曲率半径和圆心角以及支撑形式不同的弯梁桥计算模型。
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