clear span

基本解释

It had a wood-trussed clear span of over 25 meters (83 feet). It finally collapsed in the middle of the second century.
在二世纪中期倒塌的它木桁架净跨超过25米。
It is quite strange that no final conclusion has yet been reached on the clear span of this ancient bridge as the most basic datum. Public opinions are divergent.
奇怪的是，作为此古桥最基本的技术数据的净跨径现尚无定论，众说纷纭。
The article proposes to clear away the earth and stones covering the two springs of arch of the bridge and then survey and determine with accuracy its clear span .
该文建议挖开掩盖赵州桥拱脚的石块和泥土，找到两拱脚，精确测定净跨径。