<br> <br> defined by the piezoelectric effect of piezoelectric ceramics (piezoelectric ceramic plates twisted under external force, will generate a charge on its surface deformation), intrusion detectors may be made of glass breaking. High-frequency glass broken sound (10k ~ 15kHZ) is e ...more...

Tiles have always been necessary building materials for every home, but in the face of so many kinds of tiles on the market, with so many choices, many consumers already have no choice. With Xiaobian to see how the Samit tile ? How is Samit tile The quality of Samit tile can be mainly understood ...more...

Recently, the National Development and Reform Commission and the Ministry of Finance issued notices to revise the "Administrative Measures for Off-season Commercial Reserves of Chemical Fertilizers" and "Supplementary Regulations on Administrative Measures for Off-season Che ...more...

Recently, Huang Yanqiang of the Institute of Aerospace Catalysis and New Materials of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Wang Xinkui of Dalian University of Technology have made new advances in nano-gold catalysis: for the first time, multi-ph ...more...

In the current market of water storage electric water heaters, water storage electric water heater companies have been unable to win sales through sudden sales promotions or short-term outbreaks. Only by paying attention to brand equity can they achieve certain benefits in the future marke ...more...

The picture shows a large-scale anti-pinch magnetic confinement fusion experimental device (photographed on November 3rd). Xinhua News Agency reporter Liu Junxi Recently, China's first large-scale anti-field hoop magnetic confinement fusion experimental apparatus (KTX, refe ...more...

Abstract Recently, the first working meeting of the upstream and downstream cooperation mechanism of civil aircraft aluminum was held in Shanghai. At the meeting, Zhou Changyi, director of the raw materials department of the Ministry of Industry and Information Technology, proposed that the a ...more...