... 3.oil-immersed 4.Horse Head Brand 50mA Mobile X-ray Unit SF50IA 1. The unit is of single-focus, full-wave rectify ... , oil-immersed, self-immersed, self-cooling,mobile diagnostic X-ray unit2. Power ... <20A instant3. Timer 0.1-6.3 19steps electron type4. X-ray tube focus 2.3X2.35. Size of screen 350X3506. Distance ...