AN UNBIASED VIEW OF ท่อน้ำฝน

Gutters: Gutters are shallow channels that collect water at the sides on the roofs. When gutters tend to be more frequent on residential roofs, they might however be employed on industrial roofs, being a complement to interior drainage or by themselves.อ้างอิง-ภาพ : สำนักงานทรัพยากรน้ำแ�