After I retired, I received a call from an engineer with whom I had worked. He told me that, nearly three years earlier, he had installed an oven that was used to burn paint off of hooks that held sheet-metal panels while they were being painted. He had been trying to control fumes and smoke at the oven inlet ever since without success, and the workers were threatening to walk off of the job if the fumes were not controlled. I agreed to visit the plant to see if I could come up with a solution....
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