| 165 / | HD | HEAT EXCHANGE |
| DIG 454 | DD | HAVING SIDE-BY-SIDE CONDUITS STRUCTURE OR CONDUIT SECTION {16} |
| DIG 471 | DD | .~ Plural parallel conduits joined by manifold {15} |
| DIG 483 | | .~.~ Flow deflecting/retarding means in header for even distribution of fluid to plural tubes {1} |
| DIG 484 | DD | .~.~.~> Orifices mounted at conduit ends |