This paper presents the situation of application and effect of frequency-converting technique in unit heater system.
本文介绍了变频调速技术在供暖系统补水改造上的应用及改造效果分析。
And, particularly, the adoption of the frequency-converting technique has remarkably improved the screen image quality of the traditional simulated color TVs.
特别是利用变频技术显著改善了传统模拟彩电的画质。
And, particularly, the adoption of the frequency-converting technique has remarkably improved the screen image quality of the traditional simulated color TVs.
特别是利用变频技术显著改善了传统模拟彩电的画质。
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