|The Simple English Wiktionary has a definition for: vacuum.|
Vacuum is needed for some kinds of industrial production. Vacuum pumps are used to pump air out of the vacuum chamber. In the real world it is not possible to create 100% vacuum, but some vacuum pumps are able to create 99.9999% vacuum. This is called "hard vacuum". Most industrial purposes don't need hard vacuum; 0.001% is good enough.
Industrial vacuums are mainly used in:
- Food industry
- Electronics industry
- Coating and degasing
A vacuum cleaner uses a strong vacuum force to suck in dirt, cleaning the floor.