TOP GUIDELINES OF ท่อน้ำฝน

Use wooden stakes and Mason’s line or chalk line to create a sq. or rectangular shape throughout the marked spot. Make sure the formwork is stage and secure. Whilst setting up the formwork, make allowance to the slope in the direction of the middle in the drain.จังหวัดสงขลา (อำเภอเมืองสงขลา �