The trough type liquid distributor is the main part of packing tower for large scale refined unit.
槽式液体分配器是大型炼油装置中填料塔中重要组成部分。
The precision of a large scale topographic map is systematically analyzed, which is measured and drawn with the help of coordinate point distributor for the distribution of the detailed points.
对采用坐标展点器展绘碎部点坐标所测绘的大比例尺地形图的精度进行了系统地分析，并定量地给出了采用不同测距方式展点测图的点位中误差。
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