Nantong Hyosung Transformer Co.,Ltd ordered a ZYD-150 transformer oil purifier machine, which is mainly used for the maintenance of 500kV oil-immersed power transformer; They purchased it in Aug,2016 and recently conducted a comprehensive inspection of the machine. The conclusion is that the machine is still in good condition and performance, they are very satisfied with our products and services, they said that if they need to replace the equipment in the future, we will be their first contact one, and we are also willing to establish long-term relationship with them.