Air compressor turn on, turn off:
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Loaders, general noise, Work in a warehouse
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Grind metal on a grinding machine in a
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Grind wood with a grinder, noise in
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Canning machine
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Signal for lunch at the factory
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Welding transformer operation under load
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Rattling, The atmosphere of the factory
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Dry cleaning
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Hydraulic activator
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Book press
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Stop, Lathe turning on, work
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Small centrifuge
★★★★★