对在用车改装燃气装置后的经济性和环保性进行了综合分析。
The economics and environmental effect of gas fuel refitment on in-use vehicles are comprehensively analyzed.
城市污水中赋存着巨大的热能，有效回收与利用城市污水热能具有明显的节能性、经济性和环保性。
There have tremendous heat energy in the urban sewage, to reclaim and use the urban sewage heat energy effectively have obvious quality of saving energy, economic and environment protection.
包括经济性分析、节能性分析、环保性分析、安全性分析和技术分析。
Include: economic analysis, energy analysis, environmental analysis, security analysis and technical analysis.
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