1.Used in silica flour,activated calcium. 2.CE and ISO 9001:2008 3.Rapidly replace the screen, simple operation 180-270 mesh silica flour airflow sieve Through screening 120-180 mesh light calcium, 300 mesh triple superphosphate, 400 mesh activated calcium, 300 mesh hawthorn fruit powder, 320-500 mesh zinc powder, 500 mesh ferric oxide black & ferric oxide red, 120-160 mesh medicine powder 180- ...