Voltage switchgear is a set of combination products, although hundreds of domestic manufacturers, but its core components are still imported products, if you encounter technical problems, equipment maintenance and replacement is too much trouble, so abundant in budget Under the circumstances, you should try to choose well-known brands, because of its well-stocked, solve problems encountered efficiency is relatively high. To obtain a copy of the manufacturer before purchasing switchgear factory test program (or requirements), general formal manufacturers will be there, it should be clear whether the main components by drawing configuration and select the specific brands GGD switchgear manufacturers, such as Siemens, Snyder. Welding deformation of the workpiece is due to molecular weld heat expansion GGD switchgear, squeezing produce microscopic displacement GGD switchgear when welding wholesale price, you can not reset the stress generated due to cooling. In order to overcome deformation, shaping process must be considered. Shaping methods generally are: ① workpiece deformation range, deformation Anhui GGD switchgear test forecast by forcing the workpiece before welding in the opposite direction, after welding to achieve a predetermined size; ② The welding method used positive correction; ③ attack, after pressure welding relatively constricted portion, and the stress balance; ④ heating weld relatively loose convex part, to the same contraction and welding purposes; overall heat treatment of members ⑤ necessary. GGD switchgear sales price, Tianchang instrument linked instrument (certified), GGD switchgear provided by the United Instrument Sales Co., Ltd. Tianchang instrument. Instrument Sales Co., Ltd. Tianchang instrument Union (www.ylybxs.com) (www.ylybxs.com) is Chuzhou, temperature instrumentation leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. Tianchang instrument linked instruments in leadership with the staff warmly welcome all inquiries negotiations to create Tianchang instrument linked instruments better future.