It achieves a near-vacuum by extracting air from a container and reducing the air pressure inside. Vacuum rods have a wide range of applications in various fields. In the food industry, vacuum rods can be used to manufacture vacuum packaging bags, which can extend the shelf life of food and prevent oxidation and bacterial growth by packing food in a vacuum environment. In the electronics industry, vacuum rods can create high-precision vacuum environments for use in the processing and production of electronic materials to ensure product quality and stability. In the medical field, vacuum rods are used in the sterilization and packaging of surgical instruments, as well as in the storage and transportation of pharmaceuticals to ensure the safety and hygiene standards of medical equipment and pharmaceuticals.