China and the United States fight against landlords. The United States keeps the C919 engine as a Rocket, and China suddenly changes its way of playing
In the aviation industry, engines are like a heart, the key to flight.However, for a long time, China has relied on foreign technology in this field and lacks independent research and development capabilities...
Why do air conditioning merchants always say: laymen buy frequency converters, while laymen buy fixed frequencies? There is a significant difference between the two
Why do air conditioning merchants always say: laymen buy frequency converters, while laymen buy fixed frequencies? There is a significant difference between the twoWhen purchasing air conditioning, one often hears the following sentence:Non professionals buy frequency converters, while professionals buy fixed frequenciesSo, what are variable frequency air conditioners and fixed frequency air conditioners, and what are the differences between them?This article will provide a detailed explanation to help everyone better choose the right air conditioner for themselves.1...
