three-ply

English

three-ply (not comparable)

Having three strands or layers
- 1946 November and December, “New L.M.S.R. Royal Coaches”, in Railway Magazine, page 371:
  The vestibule ceilings are of three-ply, in removable sections to give access to the air-conditioning units, filters, and Pullman gangway control springs situated above.
- 1961 February, “Talking of Trains: New L.T. research laboratory”, in Trains Illustrated, page 77:
  It has been found that although the two-ply moquette used in L.T. train upholstery was of equal weight to the three-ply fabric used in L.T. buses, the bus fabric had 50 per cent longer life, and accordingly it is now being used also for trains.

having three strands or layers

three-ply (uncountable)

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