A plus is a company specialized in materials and related products for the chemical composition, physical performance analysis, testing instruments and equipment suppliers and service providers.  has hundreds of business units, research institutes, laboratories and equipment to provide professional quality service. User base includes iron and steel metallurgy, nonferrous metals, metal recycling, aerospace, rail transportation, hardware, automotive electronics, home appliances and other fields. After years of development, the company has created a wealth of experience in sales and after-sales service team. Manufacturers and users in the formation of a very high reputation.