| 165 / | HD | HEAT EXCHANGE |
| DIG 355 | DD | HAVING SEPARATE FLOW PASSAGE FOR TWO DISTINCT FLUIDS {7} |
| DIG 395 | DD | .~ Monolithic core having flow passages for two different fluids (e.g., one- piece ceramic, etc.) {2} |
| DIG 397 | | .~.~ Including conduits embedded in monolithic block |