9 computer software, hardware and monitoring equipment, which is used to control nitrogen oxides emissions from fossil fuel fired boiler plants
37 installation with respect to systems used to control nitrogen oxide emissions from fossil fuel fired boiler plants
41 training with respect to systems used to control nitrogen oxide emissions from fossil fuel fired boiler plants
42 consulting, designing, programming, testing, updating, error diagnosis and correction services with respect to systems used to control nitrogen oxide emissions from fossil fuel fired boiler plants