Various sources of indoor air pollution and complicated affecting elements result in serious damage to human health.
室内环境污染的种类繁多，污染源广泛，影响因素较为复杂，因此对人体健康造成的危害更为严重。
The paper focuses on analyzing the contents of business cost, affecting elements and main approaches to reduce business cost.
本文着重阐述了商务成本的内涵、影响因素及降低商务成本的主要途径。
There is clearly changed on yield strength and ratio of yield and tensile strength and the main affecting elements is middle frequency heating temperature before coating.
管体屈服强度和屈强比有明显变化，其主要影响因素是防腐前的中频加热温度。
The Paper mainly introduces three deflection test principles, technical features, its applicable conditions, affecting elements, data arrangement, and its evaluation.
三种弯沉测试技术及测试原理、技术特点和适用条件；数据处理及其评定。
The Paper mainly introduces three deflection test principles, technical features, its applicable conditions, affecting elements, data arrangement, and its evaluation.
三种弯沉测试技术及测试原理、技术特点和适用条件；数据处理及其评定。
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