The probe is based on an incremental glass scale insuring the best dimensional accuracy over the whole measuring span.
探头以增量光栅为基础，确保在整个测量范围中最好的空间精度。
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。
Our life is a brief span measuring some seventy or eighty years in all.
人生短暂，总共不过七八十年。
According to measuring the coordinates of each span of long span double arched bridge, the arch axis for every span is determined.
通过测量拱腹各点坐标来确定双曲拱桥每孔的拱轴线。
The largest span, measuring 60 metres in length, runs across the railway track.
全长60米的大跨度，甚至可以穿过铁轨。
The model and equations used for measuring the seismic effects of traveling wave onto long span bridges are derived and established, during the course of which the large mass method is utilized.
运用大质量法，建立并推导了长大跨度桥梁考虑行波效应的分析模型及解析方程。
The model and equations used for measuring the seismic effects of traveling wave onto long span bridges are derived and established, during the course of which the large mass method is utilized.
运用大质量法，建立并推导了长大跨度桥梁考虑行波效应的分析模型及解析方程。
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