Dental X-ray unit, x-ray , x-ray machine ,dental x-ray machine 60KV or 70KV dental X-rayCapacity 1The time of explosure can ... less than national compulsory stipulated medical X-ray protection standard,and no X-ray in theory,so the doctors ... can prevent from the harm of X-ray.Technical dataCurrent50Hz 220V±10%Time of exposure0. ... angle 360 minus rotating angle270 Dental X-ray unit(HK-R04)