37 Repair or maintenance of casting machines and casting apparatus; providing information on repair or maintenance of casting machines and casting apparatus; providing information on the operation, inspection and maintenance of casting machines and casting apparatus; providing information on the operating conditions of casting facilities and equipment; consultancy regarding operation, inspection, repair and maintenance of casting machines and casting apparatus; repair or maintenance of metalworking machines and tools; providing information relating to the repair or maintenance of metalworking machines and tools; providing information on the operation, inspection and maintenance of metalworking machines and tools; consulting regarding operation, inspection, repair and maintenance of metalworking machines and tools; repair or maintenance of measuring and testing machines and instruments; repair or maintenance of industrial furnaces