| 165 / | HD | HEAT EXCHANGE |
| DIG 76 | DD | WITH SCRAPER FOR REMOVING PRODUCT FROM HEAT TRANSFER SURFACE {4} |
| DIG 81 | DD | .~ Rotary heat exchange scraper or scraper for rotary heat exchange surface {10} |
| DIG 84 | | .~.~ Scraper within annular space formed by concentric cylinders or concentric conical surfaces |