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| Subject | Finnish | English |
| el.mach. | maanpinnan jännite | ground-surface voltage to ground |
| el.mach. | maanpinnan jännite | earth-surface voltage to earth |
| isol. | maanpinnan jännite maata vastaan | ground-surface voltage to ground |
| isol. | maanpinnan jännite maata vastaan | earth-surface voltage to earth |