Air compressor turn on, turn off:
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Gas welding
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Brewing unit, mill for grinding grain
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Factory work, general noise
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Book press
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Mechanical lift
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Welding transformer, working,, turning on
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Forklift in motion
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Circular knitting machine
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Power station generator
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Start, shutdown, run, Compressor
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Grind metal on a grinding machine in a
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Letter press
★★★★★