The precise use of scientific instruments such as oxygenators, pressure gauges, pressure reducing valves, oxygenators, small meters, calorimeters, oxygen bombs, oxygen pulse meters, 0-5-6-25MPa calorimeters, etc. relies on auxiliary equipment such as oxygenators. The specifications and quality of these small components, such as pressure gauges and pressure reducing valves, directly affect the accuracy and safety of experiments. Popularizing this knowledge is crucial for improving scientific research level.