ABOUT ระบบระบายน้ำฝน

Use wood stakes and Mason’s line or chalk line to create a square or rectangular condition round the marked area. Be certain the formwork is degree and secure. Even though setting up the formwork, make allowance with the slope towards the center of the drain.จังหวัดสงขลา (อำเภอเมืองสงขลา ก�