timbered shaft

用法例句

In order to optimize the vertical shaft frame of hyperbola cooling tower of reinforced concrete, an universal program for calculating vertical shaft frames of tower installations are developed on the basis of structural mechanics.

采用结构力学方法，编制塔式设备竖井架通用计算程序对双曲线冷却塔竖井架进行了优化设计，研究了竖井架杆身正应力、剪应力、局部及整体稳定性、自振周期的变化规律。