37 Repair information concerning furnaces for vacuum precision casting, vacuum induction melting, thermal barrier coating, vacuum remelting, inert gas atomization, silicon melting and crystallization, vacuum sintering, vacuum heat treatment, freeze drying, hot isothermal forging, and induction heated quartz tubes for heat treatment, sintering and distillation of metals, ceramics and glass; rental of plant in the nature of vacuum heat treatment furnaces for repair; installation, maintenance, servicing and repair, in particular of vacuum heat treatment furnaces and related computer hardware, pipelines, oil pipes, chemical installations, measuring machines, measuring instruments, machines for testing, instruments for testing, burners; installation, maintenance, servicing and repair, in particular of machines and equipment for loading and unloading, storage containers, storage tanks, collecting containers, nuclear power plants, optical machines and instruments, machines and equipment for distributing and monitoring electrical energy, power generators, electric motors, pumps, storage vessels; installation, maintenance, servicing and repair, in particular of metalworking machines, apparatus and tools, chemical processing machines and apparatus, filling and feed pumps; furnace installations for use at high temperatures, pressurised containers, electric lines, electric apparatus for regulating vacuum heat treatment processes, heating apparatus, industrial furnaces, pipes, turbines; installation, maintenance, servicing and repair, in particular of heat exchangers, tools, electric generators, wind power installations, conveying devices, gas turbines, metallurgical installations, smelting furnaces and installations; installation, maintenance services, maintenance and repair, in particular of industrial installations for vacuum heat treatment of metals, configuration of industrial installations for vacuum heat treatment of metals, instruments for industrial installations, tools for industrial installations, structures, buildings, and building parts