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Method of clamping air mover eductor to a plate.

Method of clamping air mover eductor to a plate.

Use of air mover eductor by welder shop.

Boilermaker working on a staircase.

Boiler shop and machine shop from southwest with asphalt blending in background.

Oil immersed telephone switch.

Oil immersed telephone switch.

Oil immersed telephone switch.

Oil immersed telephone switch.

Oil immersed telephone switch.
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