The brand originated in the United States in 1990, and the brand is now well-known in more than 20 countries and regions;The brand came to China in 1998. After more than 20 years of development, it has become the number 1 brand in the power generation industry, and the industry has also gained a high reputation. And gradually become a leading brand in petrochemical, coal chemical and other industrial fields, new energy fields, and nuclear power fields.