The electrical engineering personnel of the LIBERAL machinery cooperate with many international famous companies, which make the electric automation of the LIBERAL machinery stand on the leading end of the international electric automation all the time. The industrial applications of the industry network protocol, servo, frequency conversion, PLC are ripe day by day. Meanwhile, the advanced concepts and applications of other fields are introduced in the food machinery industry, which make the LIBERAL mechanical products be prospective and progressive even more. Is specially food machinery necessary.