treble-heading

名词 n.

英文释义

名词 n.
  1. The use of three locomotives at the front, or head, of a train. uncountable
    — Treble-heading was again recorded on the Highland line on September 2 when the 3 p.m. and 5 p.m. from Inverness both passed Pitlochry with three Type 2 diesels.
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