英语语法分析

The economics and environmental effect of gas fuel refitment on in-use vehicles are comprehensively analyzed.

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 new control system greatly improved the stability, reliability, and safety of the ventilator. The refitment is easy to implement, and the cost is low.

改进后明显提高了呼吸机的稳定性，可靠性和安全性，且成本低，易于操作。

In this paper, the principle of refitment and selection of parts are discussed. The experimental results show that the refitment on 102g gas chromatograph is successful.

本文讨论102 G色谱仪的改造原理，要点及元件的选择，对改装后的色谱仪测试表明，改装效果良好。