vacuum
Decay of the vacuum (Pair production)
Engine vacuum
False vacuum
Helium mass spectrometer – technical instrumentation to detect a vacuum leak
Vacuum brazing
Pneumatic tube – transport system using vacuum or pressure to move containers in tubes
Rarefaction – reduction of a medium's density
Suction – creation of a partial vacuum
Theta vacuum – vacuum state of semi-classical pure-Yang Mills theories
Vactrain
Vacuum cementing – natural process of solidifying homogeneous "dust" in vacuum
Vacuum column – controlling loose magnetic tape in early computer data recording tape drives
Vacuum deposition – process of depositing atoms and molecules in a sub-atmospheric pressure environment
Vacuum engineering
Vacuum flange – joining of vacuum systems
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