Explanatory Notes
Aggregate Overview
No specific explanatory note for this aggregate code. See subcategories below.
Subcategory Summary
| Code | Title | Notes? |
|---|---|---|
| 8344 | Technical Testing and Analysis | – |
| 83421 | Surface Surveying Services | ✅ |
| 83422 | Map-making Services | ✅ |
| 83430 | Weather Forecasting and Meteorology | ✅ |