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Agricultural machinery
26
Agricultural engineering
24
Tobacco -- Research
21
Tobacco -- Harvesting
17
Tobacco curing
12
Agricultural mechanics
8
Harvesting machinery
7
Tobacco industry
7
Vibration
6
Agriculture -- Research
5
Tobacco
5
Employees -- Workload
4
Farm mechanization
4
Acceleration (Mechanics)
3
Hydraulic machinery
3
Machinery
3
Pests -- Control
3
Scientific apparatus and instruments
3
Agricultural experiment stations
2
Agricultural facilities
2