GETTING MY ระบบระบายน้ำฝน TO WORK

Use picket stakes and Mason’s line or chalk line to make a sq. or rectangular form round the marked location. Make sure the formwork is degree and secure. Whilst building the formwork, make allowance to the slope towards the center with the drain.สัมผัสประสบการณ์จิบน้ำชายามบ่ายสุ�