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DEGREE OF VACUUM
Vacuums are often classified according to their operating systems. There are five categories of vacuum systems:
- Low vacuum = 760 –25 Torrs
- Medium vacuum = 25 – 10-3Torrs
- High vacuum = 10-3–10-6 Torrs
- Very high vacuum = 10 –6–10-9 Torrs
- Ultra-high vacuum = 10 –9Torrs and below
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