upper (air)front是什么意思

用法例句

Technique of whole moving inside-climbing tower crane horizontally at high altitudes;

内爬塔吊高空整体迁移技术

Numerical simulation research on the radioactive plume diffusion led by nuclear explosion test at high altitudes;

高空核试验放射性烟云扩散的数值模拟研究

In the construction of the high altitude overhanging frame,the technology of the section steel triumph support system with the characteristics of better stability and high rigidity is adopted.

高空大跨度悬挑结构施工中,采用型钢三角型支撑体系的施工技术,该支撑体系稳定性好,刚度大,施工简便,安全可靠,可缩短施工工期,减少工程建设投资。

Constructing technology of high-altitude and big-span concrete high shelves;

高空大跨混凝土高梁施工技术

Low-altitude and high-altitude nuclear explosions are sources of intensive additional ionization in ionosphere.

数值分析结果表明:低空核爆炸产生的自由电子的密度最大值要高于高空核爆炸;对于瞬发核辐射的影响,低空核爆炸和高空核爆炸有着显著的差异;而缓发核辐射的持续时间、影响范围,高空核爆炸情况要大于低空核爆炸。

Formation rule of high blank value in determining aqueous TN level and its solution;

水质总氮测试中高空白值形成规律与对策