ventilating shaft

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of ventilation shaft.
    — The tunnel was constructed about eighty years ago, and is 1 mile 1,224 yd. long, […] There are eight existing ventilating shafts varying in diameter from 8 to 10 ft. and in depth from 52 to 336 ft.

词形变化

ventilating shafts plural
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