paired column

• 成对柱

paired column的用法和样例：

例句

1. In addition, it is also a perplexed engineering problem in designing the under-structural column of ACSR when considering the supporting stiffness to the top of the column.
   另外，在设计波纹拱下部结构柱时，如何考虑波纹拱对柱顶支承刚度也是困扰工程界的一个问题。