Hydraulic activator:
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Brewing unit, mill for grinding grain
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Bottling plant
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Power station generator
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Air compressor turn on, turn off
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Car factory
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Lathe turning on, work, stop
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The atmosphere of the factory, rattling
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Book press
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Conveyor belt, Conveyor
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Forklift drives by
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Off, Forklift, standby, on
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Welding transformer operation under load
★★★★★