manhole with vertical hanging cover

例句：

1. 1. Themanhole was covered with a layer ofdirt and grass.
   这个地洞被一层土和草覆盖着。
2. 2. Themanhole was used torepair the sewer system.
   这个检修口用于修理下水道系统。
3. 3. Themanhole was located in the center ofthe road.
   这个检修口位于道路的中心。