Before using the X-ray flaw detector, check whether the air pressure of the high-pressure generator is lower than 0.34MPa. If the air pressure is lower than the low-pressure value, stop the operation in time and use it normally after leak detection and replenishment. The quality of materials is an important indicator of the overall technological level of a country. We are still far from the developed countries in the world. For example, what affects the life of an X-ray tube is the electron emission capability of the filament material of the X-ray tube. The life of X-ray tubes of international advanced equipment can reach thousands of hours, and we only have 400-500 hours.