Rolling Mill Machinery and Equipment 1768 3351 Rolling, Drawing, and Extruding Of Copper 3303 3356 Rolling, Drawing, and Extruding of Nonferrous Metals, Except Copper and Aluminum 4361 5033 Roofing, Siding, and Insulation Materials 8412 1761 Roofing, Siding, and Sheet Metal Work 66301 7021 Rooming and Boarding Houses 2966 3021