This standard specifies the structural type, model, main technical parameters, technical conditions, test methods and inspection rules, marking and packaging requirements of laboratory (smooth roller surface) double-roller crushers. This standard applies to laboratory double-roller crushers. Double-roller crushers manufactured in accordance with this standard can be used in laboratories of geology, metallurgy, coal, chemical industry, building materials, commodity inspection, environmental protection, scientific research and other departments to crush various ores, rocks and other brittle materials with a compressive strength of less than 250MPa. use.