When the refrigerant quality changes, the far-field sound pressure spectrum does not change much. Generally speaking: when charging R410a refrigerant, its far-field sound pressure is larger. This is because the internal acoustic radiation impedance is related to the density of the refrigerant. Th ...read more...
June 30-September 30, 2011 is the transition period for Shenzhen to implement new standards for exhaust gas detection in motor vehicles. It is understood that after three months of transitional testing, in addition to some long-term vehicles in the field, the original yellow and green vehicles in S ...read more...
Linear Stepper MotorLinear Stepper Motor,3D Printer Motor,Stepping Motor,Externally Driven Stepper MotorChangzhou Hebe Interantional Trade Co., Ltd , http://www.hebe-motion.com ...read more...
On July 8, German Chancellor Angela Merkel delivered a speech on sustainable development at Tsinghua University, and together with Miao Miao, Minister of the Ministry of Industry and Information Technology of China, jointly pulled the handle of the Sino-German electric vehicle cooperation project. ...read more...
The grain quality of grain in a certain container is the grain bulk density, and the bulk density value is an important test index of wheat quality quality. The size of the bulk density value can comprehensively reflect the characteristics and characteristics of grain size, quality, shape ...read more...
The advantages of automatic powder packaging machine are simple and easy to use, safe and reliable, continuous filling precision, packaging speed, easy maintenance, is the ideal equipment for users to choose the rich. At present, the packaging machine market, with the advancement of science and tec ...read more...
Recently, the global parts and components industry is surging, and news of acquisitions and mergers between suppliers has emerged one after another. A few days ago, Karl-Friedrich Stracke, president of Magnustel Automotive Technology and Engineering, accepted the media interview and revealed ...read more...