55 / | HD | GAS SEPARATION |
342 | DF | MULTIPLE SEPARATORS, EACH WITH DISCRETE AND LONGITUDINALLY CONFINED GAS INLET OR OUTLET FLOW PATH {5} |
342.1 | DF | .~ With heating or cooling means or having insulation {1} |
342.2 | .~.~ Heat exchanger is part of separator or is contiguous therewith |