... won the n national patent .The machine is suitable for all kinds of powder materials which size is between ... , talcum powder , industrial medicine , cosmetic , fire extinguishing agent , china clay , abrasive materials , aluminum powder , glass powder , fire –proof ... low noise , low waste electricity , continuous working , less maintenance . 5.Parameter ParameterWS-600WS-1000WS-1600WS-2000Airflow(m3 ...