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Related Notes:

1. Vacuum machine: a machine and equipment that uses vacuum technology to package food or other items.

2. Vacuum bag: a plastic bag with good sealing performance for vacuum food or other items.

3. Vacuum pump: a kind of mechanical equipment used to extract air to form a vacuum environment.

4. Vacuum: refers to the size of the density of gas molecules in the air under certain conditions, usually expressed in Pascal (Pa) or millibar (mbar).

5. Vacuum packing: a packaging method that puts food or other items in a vacuum bag and extracts the air in the bag through vacuum technology to achieve freshness, anti-corrosion, anti-oxidation and other effects.

6. Vacuum preservation: use vacuum technology to put food or other items in a vacuum bag to remove oxygen in the bag, thereby extending the shelf life of food or other items.

7. Vacuum sealer: A kind of machine equipment used to seal vacuum bags, usually using heat sealing or cold sealing technology.

8. Vacuum materials: materials used for vacuum filling, usually including vacuum bags, vacuum pumps, vacuum valves, etc.

9. Vacuum technology: a technology that uses a vacuum environment to preserve, preseptic, and prevent oxidation of food or other items.