forth line meaning in English

起泡线

Firstly , the company ' s strategic situation , including external factors ( macro situation , general state of industry ) and internal factors , are analysized with five force models of competition and swot model , etc . then , the article uses financial analysis tool to draw the conclusion that the forth line of guangshen railway is a fault investment decision
首先对企业战略环境进行了分析，包括外部环境分析(宏观环境分析、行业状况分析)及企业内部状况分析两部分，分析中应用了竞争的五种力量模型和swot模型等。依据内外两方面的分析，辅之以财务管理分析工具，最终导出增建广深第四线项目是一个失误的投资决策的结论。