October 2014 China Metallurgical Group Co., Ltd. Seven MetallurgicalConstruction Co., Ltd. purchased a ZYD-30 high-efficiency two-stage vacuum oilpurifier in our company for the use of Chongqing Hanjiang Project Department.According to my company''s after-sales visit that the device is currentlyrunning very smoothly, the oil filter effect is good, easy to operate.Equipment users expressed my satisfaction and gratitude for the service of ourcompany.