effective length短语⁹⁶⁶⁷⁷⁺⁶ 基本例句 有效长度 This paper offers a simple method for computing the effective length of two- stepped columns. 本文提供一个解算双阶柱计算长度的简捷计算法。 cnki We first introduce the background of the effective length of bent column of the code, and point out the exist problems. 首先介绍了我国规范中的排架柱的计算长度的历史背景，并指出其中存在的问题。 cnki