标准摘要
[中文适用范围]： 本文件规定了应用一组明确的代数公式来计算烟层具体特征的要求。 [外文原描述]： This document specifies the requirements governing the application of a set of explicit algebraic formulae for the calculation of specific characteristics of smoke layers.
英文名称Fire safety engineering — Requirements governing algebraic formulae — Part 4: Smoke layers