The present invention relates to certain SGLT-2 inhibitors for treating andor preventing oxidative stress, for example in patients with type 1 or type 2 diabetes, as well as to the use of such SGLT-2 inhibitors in treatment andor prevention of cardiovascular diseases in patients, for example type 1 or type 2 diabetes patients. Apparatus is provided for linear phase modulation utilizing a phase-locked loop. Each branch line section is connected to one solids injection lance for supplying iron-containing material and carbonaceous material to that lance. The speed changing unit changes a reduction ratio of the reduction mechanism, a power switch for turning on and off a power source of the motor. The first memory and the second memory are of different types.