37
Maintenance and repair services for furnaces and refractory linings and structures; welding repair services; furnace and oven repair and maintenance services; kiln repair and maintenance services; maintenance and repair services for ladles, machinery, apparatus and instruments used in the metallurgical processing and smelting industry; cleaning services for furnaces, ovens, kilns, ladles, machinery, apparatus and instruments used in the metallurgical, smelting and processing industries
42
consulting services, namely, consulting services in relation to metallurgical and smelting industries; technical research and consultation in the field of metallurgy and smelting; inspection of the machinery of others in the metallurgical and smelting industries; inspection and evaluation of foundry apparatus; testing and sampling molten metal; information and advisory services relating to refining, casting, processing and treatment of metals and their alloys