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simple past and past participle of sleeper examples
not comparable
(usually in combination) Relating to railway sleepers. quotations examples
Nor, having married coach and bogie design successfully, does it follow that good riding will ensue, whatever the track carrying it—as the performance of B.R. standard coaches on flat-bottom, concrete-sleepered track bears witness.
1960 December, “Talking of Trains: The riding of B.R. coaches”, in Trains Illustrated, page 705