Weihai Zhide Vacuum Technology Co., Ltd. is invested and constructed by China machinery industry group. It is the first domestic enterprise specializing in large-scale production of dry screw vacuum pump. The total investment of the company is 20 million yuan, covering an area of more than 50 mu, with 15000 square meters of factory building and complete supporting facilities. The project adopts patented technology to produce dry screw vacuum pumps, with an annual production capacity of 500 sets and a sales revenue of 60 million yuan. At present, only the United States, Japan, Germany, the United Kingdom and South Korea can produce dry screw vacuum pumps in the world.