| 165 / | HD | HEAT EXCHANGE |
| DIG 184 | DD | INDIRECT-CONTACT CONDENSER {12} |
| DIG 202 | | .~ Vapor flow passage between vapor inlet and outlet has decreasing cross- sectional area {1} |
| DIG 203 | DD | .~.~> Coolant tubes arranged in groups to form vapor flow lanes of decreasing cross-sectional area |