On March 3 and 5, the 2015 National “Two Conferencesâ€, which have received much attention, will be held in Beijing. At that time, the Red Flag H7 will once again become the "two sessions" service car,.......
The contact line of the twin-screw compressor is a space curve formed when the two rotor tooth faces are in contact with each other when the male and female rotors of the compressor are engaged.
In actual compressors, the theoretical contact line ev.......
At present, the wheat harvest in Anhui Province has been successfully completed. However, the excessive moisture content of wheat caused by rainy weather has caused rushing farmers to sell food. According to the regulations, the demand for wheat in the market must not exceed 12.5%, but the.......
The cleaning of windows is not only a matter of appearance, but it is also necessary in terms of safety. Especially on rainy nights, the film's glare will affect the field of vision and must be cleared immediately. If it is a slight stain, it can be wiped clean with a towel without th.......
Organic wastewater treatment is a common problem in current pollution control. Traditional methods include activated sludge method, biofilm method, anaer.......
The German Volkswagen Group issued a statement on the 29th that about 5 million Volkswagen brand passenger cars will be returned to the factory for maintenance due to the "emission door" incident, including the sixth gene.......
Lubricating oil companies can find the best partners around the world, choose and purchase their own resources in the domestic market and international market, and also get the latest technology to improve product quality, reduce production costs and improve Organizational efficiency. .......