Blwch Dosbarthu 1 Polyn Cyfres HDB-C
| Cod Math Fflysio | Cod Math Arwyneb | DIM Ffyrdd |
| HDB-C-SPN-4-F | HDB-C-SPN-4-S | 4ffordd |
| HDB-C-SPN-6-F | HDB-C-SPN-6-S | 6ffordd |
| HDB-C-SPN-8-F | HDB-C-SPN-8-S | 8ffordd |
| HDB-C-SPN-10-F | HDB-C-SPN-10-S | 10 ffordd |
| HDB-C-SPN-12-F | HDB-C-SPN-12-S | 12 ffordd |
Ysgrifennwch eich neges yma a'i hanfon atom ni
