Mass transfer devices for use in the petroleum and petrochemical industry, namely, fractionation trays in the nature of distillation units used in the separation of volatile chemicals and water distillation unit columns

Mass transfer devices for use in the petroleum and petrochemical industry, namely, fractionation trays used in the separation of volitile chemicals and water distillation unit columns

Mass transfer devices for use in the petroleum and petrochemical industry, namely, fractionation trays used in the separation of volatile chemicals and water distillation columns

Mass transfer devices for use in the petroleum and petrochemical industry, namely, fractionation trays used in the separation of volatile chemicals and water distillation unit columns