Everything else being equal , a cold air column , because of its higher air density , is heavier than a warm air column and thus produces a higher air pressure 在一般相同情况下,冷空气柱因其密度较高,会比暖空气柱重,因而产生气压较大
Everything else being equal , a cold air column , because of its higher air density , is heavier than a warm air column and thus produces a higher air pressure 在一般相同情况下,冷空气柱因其密度较高,会比暖空气柱重,因而产生气压较大
Notice that they are all five - sided more or less . and notice , from a distance as you start your hike , how geological movements as the basaltic magma congealed have produced a wall of bent basalt columns 向前走,你不妨留意远处一堵高耸的岩柱墙,一条条的岩柱因岩浆凝固时遇地壳移动,都呈现了扭曲的形状。
As the preheater tower span of large scale nsp cement plant is great and the internal stress of single beam and pole is also great , steel structure and reinforced beam / pole be used widely because of their special performance 摘要近十年来,由于大规模水泥厂窑尾塔架跨度大,单根梁柱的内力大,钢结构梁柱和钢管混凝土柱因其特有的性能优势得到了广泛的应用。