clay drain

英 美
  • 排水瓦管
  • clay n.黏土;泥土
  • drain v.排出;排干;喝光;耗尽n.下水道;消耗
    1. A layer of coarse gravel is often placed around the drain tile.
      常常在排水瓦管周围铺一层粗石砾。