阐述了煤巷临时支护现用方法存在的不足和隐患，提出了采用新支护方法的优点和安全性。
Expounds the existing problem of coal tunnel temporary support, put forwards the advantage and safety of new method.
基建工程代建制是一个新的建设模式，文章对代建制的优点和存在的不足进行了较详细的分析。
Delegating system for civil construction project is a new mode of civil construction. This paper provides comparatively detailed analysis on the advantages and disadvantages of the delegating system.
阐述了当前紧密纺纱的成效、优点、存在的不足和缺陷。
The effect, advantages and disadvantages of current compact yarn were expounded.
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