This standard specifies the basic structural type, main technical parameters, model preparation method, technical requirements, test methods, inspection rules, marking, packaging and other requirements of the rotary sample reducer. This standard is applicable to rotary sample dividers (hereinafter referred to as "dividers") used in laboratories of production and scientific research departments such as geology, metallurgy, nonferrous metals, coal, building materials, chemicals, etc. to divide dry samples with particle sizes less than 3 mm. .