Flow meters; Flow regulators for commercial use for controlling flow rates of gases, liquids, and slurries; Flow switches for monitoring and controlling the flow of gases or liquids; Automatic liquid-flow control machines and instruments; Automatic valves for controlling flow rates of gases, liquids, and slurries; Gas flow meters; Gas flow monitors; Metering orifices, namely, orifice plates for metering or controlling the flow rate of liquids; Microsensors for measurement of pressure, acceler...

Chemical Additives for oil well drilling fluids

Electronic Flow Meters