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Man saying, "This is a drill"
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Man saying, "This is a drill"
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Man saying, "Lockdown"
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Engine whirring of machine shop belt sander grinder in operation
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Truck start up, stalls
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Loud spitting hiss of an air compressor machine releasing short burst
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Flexing and bending a metal sheet
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Woman saying, "Will the plant nurse please report to column B77", filtered
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Man saying, "Patrol is needed in the north"
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Clunking of vintage cigarette machine pack selection knob being pulled