THE BASIC PRINCIPLES OF ท่อน้ำฝน

Gutters: Gutters are shallow channels that collect water at the edges of your roofs. Whilst gutters are more typical on household roofs, they can even now be utilised on commercial roofs, like a complement to inside drainage or by on their own.อ้างอิง-ภาพ : สำนักงานทรัพยากรน้ำแห่ง�