The line spacing is the vertical distance between the base lines of two consecutive lines of text.
行距是两个连续文本行的基线之间的垂直距离。
The base is fixed near the building wall, the vertical axle line is parallel to the building wall, the distance from vertical axle line to the wall is 3m.
底座固定在建筑物墙面附近，其纵向轴心线与建筑物墙面平行，纵轴线到墙面间距为3米。
This method apply the length of the stadia as base line, survey the vertical angular of the two ends of the base ling by theodolite and get the distance between the station and stadia.
该方法是以视距尺的定长作基线，利用经纬仪测定基线两端点的竖直角，求出立尺点至测站点间的距离。
This method apply the length of the stadia as base line, survey the vertical angular of the two ends of the base ling by theodolite and get the distance between the station and stadia.
该方法是以视距尺的定长作基线，利用经纬仪测定基线两端点的竖直角，求出立尺点至测站点间的距离。
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