... transformer, magnifying, digital counter, air pump , cooling fan , x-ray tube.4.2. The tube housing of orientation unit is horizontal and the ... to maintain.4.6. The switch of power, voltage of x-tube and the current knob are in the front of the ... a whole. put the x-ray tube in tube housing .Caution: Dont contact with the Be window of X-ray tube during the installation .dont ...