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The two air pollution control devices that are usually used to remove very fine particles from the flue gas are

1. Cyclone and Venturi Scrubber
2. Cyclone and Packed Scrubber
3. Electrostatic Precipitator and Fabric Filter
4. Settling Chamber and Tray Scrubber

Correct answer: Electrostatic Precipitator and Fabric Filter

Solution

Electrostatic precipitators and fabric filters are specifically designed to capture very fine particles from flue gas through different mechanisms, making them highly effective for air pollution control in industrial applications.

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