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New York: Workers in antiseptic suits working with microscopes. Older men in lab coats check dials and gauges. Two factory workers weld large containment pipes that will hold chemicals. Older factory operator with goggles welds pieces of metal using a very long pole. Various shots of workers welding corners, lining and glass for containment units. CU of shovel carrying chemical for protective glass. Worker wearing gas mask climbs into tank to spray chemicals on the inside. Other Factory worker operates dials and shifts large cranks.