Can the service life specification of dr machine be written?

yes. According to the "Regulations on the Supervision and Administration of Medical Devices", the instructions and labels of medical devices should be marked with "production date, service life or expiration date", and DR machines are medical devices, which will indicate the service life. DR is the most commonly used means of imaging examination. Its principle is to use the penetrating principle of X-rays. When penetrating into the human body, the tissues and organs of the human body are imaged with different densities and different grayness. DR is usually used for the initial screening examination of various solid organ diseases, which is cheap and fast, but it has radiation. Pregnant women and children should be cautious.