Signal others to coordinate work activities.
- 51-6091.00 Extruding and Forming Machine Setters, Operators, and Tenders, Synthetic and Glass Fibers
- 51-4032.00 Drilling and Boring Machine Tool Setters, Operators, and Tenders, Metal and Plastic
- 51-8092.00 Gas Plant Operators
- 51-4051.00 Metal-Refining Furnace Operators and Tenders
- 43-5111.00 Weighers, Measurers, Checkers, and Samplers, Recordkeeping