| 165 / | HD | HEAT EXCHANGE |
| DIG 355 | DD | HAVING SEPARATE FLOW PASSAGE FOR TWO DISTINCT FLUIDS {7} |
| DIG 400 | DD | .~ Shell enclosed conduit assembly {4} |
| DIG 427 | DD | .~.~ Manifold for tube-side fluid (i.e., parallel) {5} |
| DIG 435 | | .~.~.~ Plural bonded conduit end portions (i.e., tubesheet not needed) |