To assemble and install devices, machinery, and units,
including temperature insulation units, ducts, blowers, registers,
humidity, and thermostatic controls for the control of air
temperature below fifty degrees Fahrenheit in refrigerators,
refrigerated rooms, and insulated refrigerated spaces and to
construct walk-in refrigerator boxes.
To assemble and install devices, machinery, and units,
including temperature insulation units, ducts, blowers, registers,
humidity, and thermostatic controls for the control of air
temperature below fifty degrees Fahrenheit in refrigerators,
refrigerated rooms, and insulated refrigerated spaces and to
construct walk-in refrigerator boxes.