oil hub seal
Oil seals work by creating a tight seal around the rotating shaft. This prevents oil and other fluids from escaping while allowing the shaft to rotate smoothly. The seal is usually made up of a lip that fits snugly against the shaft, preventing any leaks from occurring. Some oil seals also have additional features, such as springs or gaskets, to provide extra support and ensure a secure fit.
oil seal for rotating shaft

Unlike direct food additives, indirect food additives are not intentionally added to food. Instead, these substances may come into contact with food during processing, packaging, or storage. They can include residues from packaging materials, lubricants used in processing equipment, and even substances from cleaning agents used in food preparation areas.
direct and indirect food additives
