811310  Commercial and Industrial Machinery and Equipment (Except 
        Automotive and Electronic) Repair and Maintenance 

This industry comprises establishments primarily engaged in the 
repair and maintenance of commercial and industrial machinery and 
equipment. Establishments in this industry either sharpen/install 
commercial and industrial machinery blades and saws or provide welding
(e.g., automotive, general) repair services; or repair agricultural 
and other heavy and industrial machinery and equipment (e.g., 
forklifts and other materials handling equipment, machine tools, 
commercial refrigeration equipment, construction equipment, and 
mining machinery).

The data published with NAICS code 811310 are comprised of these parts 
of the following SIC industries:

     7623 (pt)  Commercial Refrigeration Equipment Repair
     7694 (pt)  Armature Rewinding and Repair Shops
     7699 (pt)  Industrial and Farm Machinery and Equipment Repair