Signal for lunch at the factory:
- Lathe turning on, stop, work
- Breakdown press
- Machine engine gaining momentum
- Factory atmosphere, drone in a mine tunnel
- Industrial exhaust fan
- Box making machine
- Turn off, Air compressor turn on
- Signal for lunch at the factory
- Heidelberian sorting printer
- Automatic folder
- Hydraulic activator
- Grind metal on a grinding machine in a
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