It's built with something called a buttressed core: you have a strong centre section with legs that buttress it all the way up.
它的建造依赖这一个支撑核心：你有一个坚强的核心部分来保证整个塔是直的。
The pipeline bridge is built up with triangle sections, its shear stiffness can be derived from the stress diagram for the truss with triangle section.
在管道跨越工程中，常用三角形截面组合管拱，由三角形截面桁梁的受力分析图，分析推导出其抗剪刚度。
Based on the force analysis of single bubble movement and movement characteristic research of many bubbles in random time section, the mathematics modeling of many bubbles movement was built up.
在对水下单气泡运动受力分析及任意时间剖面多气泡运动特性研究的基础上，建立了水下气泡群运动数学模型。
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