China Earthquake Networks officially determined that an earthquake of magnitude 4.2 occurred at 21:46 on December 22, 2021 in Tianning District, Changzhou City, Jiangsu Province (31.75 degrees north latitude, 120.00 degrees east longitude), with a focal depth of 10 kilometers. The earthquake caused a strong sense of earthquake, especially in Wuxi, Suzhou, Yangzhou, etc. Many netizens in Shanghai said that the bed shook and the windows made noises. The earthquake was also felt in Nanjing and other places.
Mr. Wang's workshop wanted to install a batch of large industrial fans to relieve the heat in summer. After searching on the Internet, it was all good. I made an appointment to visit the door to investigate the quotation, but the prices were very different. Then the question came, which one should I buy? what about? This industrial big fan is very cheap, do you want to buy it?