Description: buzzing and humming of an industrial power generator.

Description: buzzing and humming of an industrial power generator.

Description: industrial machinery.

Description: excavator digs the soil and load the truck.

Description: excavator digs the soil.

Description: industrial plant (beverage factory).

Description: Truck (dump): pass by.

Description: Running: on black top.

Description: Electronic Door Bell: distant.

Description: industrial machinery, machine noise.

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