Tunnell
Mae tri math o dunnell - tunnell hir, tunnell fer a thunnell fetrig. Dewiswch uned fwy penodol.
Mae tri math o dunnell - tunnell hir, tunnell fer a thunnell fetrig. Dewiswch uned fwy penodol.
Uned bwyso metrig sy'n gyfwerth â milfed ran cilogram.