Announcement on October 27, 2016: The company has recently obtained a utility model patent and a patent certificate issued by the State Intellectual Property Office of the People's Republic of China. The name of the patent: a prestress detection device for steel strand based on the reverse tension method. Patent No .: ZL 2016 2 0473075.6. Obtaining this patent is conducive to the company's advantages in technological research and development, to protect the company's advanced detection technology, improve the quality and efficiency of the company's testing equipment, and better complete the testing task.