headcode

词形变化

headcodes 复数 headcodes

释义与例句

n.
  1. 1.

    A code used to distinguish classes of train for the benefit of signalmen, formerly by using white oil lamps (or white discs) placed on brackets on the front of the locomotive. The various lamp positions defined the class of train.

    英国 交通

词源

From head + code.

来源：wiktionary