73291594
Jan 2, 1981
Mar 27, 1984
Chemical Feed Treatment Equipment-Namely, Liquid Pumps for Chemicals and Liquid Tanks and Drums Not Corroded by the Chemicals Handled for Use in Treatment Processes in Chemical Petroleum and Petrochemical Industries
MachineryBoiler Feed Treatment and/or Cooling Tower Treatment Systems, Comprising Liquid Pumps-Namely, Metering or Proportioning Pumps for Use in Treatment Processes in Chemical Petroleum and Petrochemical Industries
Electrical and Scientific Apparatus