Upper level: e2  Natural environment and humanmade changes to environment

e255  Vibration

Regular or irregular to and fro motion of an object or an individual caused by a physical disturbance, such as shaking, quivering, quick jerky movements of things, buildings or people caused by small or large equipment, aircraft and explosions.

Exclusion: natural events (e230), such as vibration or shaking of the earth caused by earthquakes

Lower livel:

• e255w1  The vibration happens to the working environment because of the problem or the aircraft, etc. in equipment.

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