1.ISO9001:2008 and CCC 2Simple structure 3.Small dimensions 4Low cost 5.Safe ... industry, food industry.etc, suitable for conveying powder, granular, small block materials, such as cement, grain, chemical fertilizer, ash, sand, not ... materials.It’s working temperature is -20 to 40 °C,and the temperature of materials transported is -20 to 80 °C ...