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Agricultural machinery
6
Tobacco -- Harvesting
5
Vibration
5
Employees -- Workload
4
Acceleration (Mechanics)
3
Harvesting machinery
3
Hydraulic machinery
3
Machinery
3
Angles (Geometry)
2
Crop yields
2
Heart rate monitoring
2
Tobacco curing
2
Agricultural engineering
1
Air
1
Chain saws
1
Computers
1
Cotton
1
Defoliation
1
Electronic apparatus and appliances
1
Engines
1