This product is widely used in plants ,warehouses,material stocks to lift goods ,It is prohibited to use the equipment in the combustible ,explosiveor corrosives environment. Atahis product hac two operational methods,ground or operational room which has open model and closed model and can be installed on the left or right side according to the practical situation .And the direction of entering the gate has two forms, sideway and ends in order to satisfy the users choice under different conditions.