The story
From double track + -ing.
Etymology from Wiktionary, CC BY-SA 4.0.
double-tracking
Today it means: The provision of double track, usually as a conversion from single track. Full definition →
Today it means: The provision of double track, usually as a conversion from single track. Full definition →
From double track + -ing.
Etymology from Wiktionary, CC BY-SA 4.0.