... diameter and length of arch, and heat treatment pole, set up suitable heat power, use ↑, ↓ to adjust.2.3 ... stop heating. After heated, relax the holder, life down the arch then carry on next heat.3. Braze ... switch, through the mode switch key-press button to set up braze welding, shows q_X, and according to the ... causticity air indoor.8. When the machine breaks down, contact the factory or be fix by the ...