Grinder:
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Electric surface grinding machine
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Build, run, shutdown, compressor, start
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Sawing
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Tool belt thrown to the ground
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Bobcat loader approaching, jamming
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Skating rink, Road construction, laying,
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The destruction of the building by the core
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Excavator digs a hole
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Home construction, saws,, hammers
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Bobcat loader, drive away, start up
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Excavator starts up, expects to be jammed
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Truck crane works
★★★★★