noun
a machine or tool that operates by air pressure
adjective
relating to or using air or other gases under pressure
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The pneumatic system in the factory helps to power various machines efficiently.
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I heard they are installing a new pneumatic tube system in the office for sending documents quickly.
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I can't believe how fast that pneumatic drill is, it's like lightning!
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Her words were like a pneumatic hammer, hitting hard and leaving a lasting impact.