Getting My ท่อน้ำฝน To Work
Use wooden stakes and Mason’s line or chalk line to produce a square or rectangular form round the marked spot. Ensure the formwork is degree and secure. Whilst setting up the formwork, make allowance to the slope in direction of the center on the drain.ดังนั้นการจะนําน้ำมาใช้ หรือ การ