9 Scientific, weighing, measuring, detecting, testing, inspecting, and teaching apparatus and instruments, namely, flow meters and flow controllers for gases, chemical compounds, water based liquids, hydraulic fluids, solvents, oils and fuels for use in measurement and testing in the fields of aerospace, biomedical and scientific equipment, chemicals, metallurgy, metrology, biotech, pharma, petrochemical, energy and construction; flow calibration and measurement systems comprised of controls, meters, computer hardware and sensors for gases and fluids, electric instrument control panels and assemblies, gas mixer and gas distribution equipment for use in the fields of aerospace, biomedical and scientific equipment, chemicals, metallurgy, metrology, biotech, pharma, petrochemical, energy and construction; fluid measurement and conditioning systems comprised of flow meters and computer hardware for use in the fields of aerospace, biomedical and scientific equipment, chemicals, metallurgy, metrology, biotech, pharma, petrochemical, energy and construction; Systems for metal additive manufacturing comprised of controls, meters, computer hardware and sensors for use in thermal spray, cold spay and welding applications, namely, calibration and measurement, gas management, measuring, conditioning and preparation of materials and surfaces, and for feeding materials; downloadable integrated industrial software for metal additive manufacturing used in the fields of thermal spray, cold spray, and welding applications