Synchronous electric gourds are 5 tons to 30 tons. Synchronous electric gourds are also called group hanging electric gourds, DHP ring-chain electric hexer. It is characterized by slow speed and good synchronization. Suitable for the improvement of large equipment and stable operation. With control cabinets, single and multi -table improvement can be achieved, which is relatively simple to operate. It uses a disc motor, which is suitable for the improvement of large oil tanks, and is also used in building climbing racks.