In the current transportation field at home and abroad, rail transit (including urban subway and light rail, intercity railway and intercity subway) has become the trend of public transportation development in various countries and regions. In modern society, people have high requirements for safety

In recent years, with the increasing number of patients with air conditioning disease, people have questioned the traditional ventilation method. The original air conditioning system can not well meet people's requirements for indoor ventilation, if the air conditioning cleaning is not timely and ev

There are often many sources of chemical pollution in the laboratory that are not conducive to human health, especially harmful gases, and it is very important to eliminate them. Fume hoods are ventilation equipment for the safe handling of harmful, toxic gases or vapors, and are used to capture, se

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