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。
Refitment of nc machine tool which machined rotor profile of Roots blower, and functional allocation of nc system are set forth. Machining procedure of rotor profile and its trial run are introduced.
阐述了加工罗茨鼓风机转子型面的数控机床的改装，数控系统的功能配置，介绍了转子型面的加工程序及其调试。
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