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Amgueddfa Cymru – Museum Wales
The advantage of a turntable without rails is that wagons can be pushed across it from any angle without first aligning the tracks. The cast iron plates guide the wheels back onto the tracks.
Collection of slides forming lecture "Rails in the Slate Industry" by D.R. Geering, UMIST 3rd year Mechanical Engineering Projects, c.1975 (copy of lecture notes in related material).
