Centrifugal pumps; Gas compressors; Gasifiers; Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges; Pumps and compressors as parts of machines, motors and engines; Pumps as parts of machines, motors and engines; Pumps for machines; Valves as machine components; Valves for pumps; Variable frequency drives for large power applications in the oil and ga...