DHM2 Ventilation Dry-wet meter is a main instrument used to measure humidity and temperature in indoor and outdoor air. Ventilation and dry-wet meter is mainly composed of two identical mercury thermometers and a ventilator. When in use, ventilator is activated to make the ventilator inside. An.......

1, stuffing box leakage This is the main run, run, drip, leak, often seen in the factory. Leakage caused by the stuffing box has the following reasons: â‘  filler and the working medium corrosive, temperature and pressure do not match; â‘¡ filling method is wrong, especially the whole p.......

China's first self-supporting high-speed rescue boat, which was developed by Harbin Institute of Technology, was successfully tested in Shenzhen. This "magical" ".......

The term “two squeezes” appears in this newspaper. It was first used to describe the rising price of raw materials in the upper reaches of the fertilizer industry, resulting in rising costs and a dilemma in which the lower reaches can not easily raise prices in order to protect the.......