@DreddanGamer @TylorStankley @hostiledesign Yes the flat grates provide ventilation, but the raised grates are installed in certain specific locations to reduce flooding.
https://archive.nytimes.com/ci... https://t.co/DogHCSjTTw
@DreddanGamer @TylorStankley @hostiledesign 是的，平面格栅提供通风，但凸起的格栅安装在某些特定位置以减少洪水。
https://archive.nytimes.com/ci... https://t.co/DogHCSjTTw