HELPING THE OTHERS REALIZE THE ADVANTAGES OF ROOF DRAIN

Use wood stakes and Mason’s line or chalk line to produce a square or rectangular form round the marked region. Make certain the formwork is stage and safe. When creating the formwork, make allowance with the slope to the center on the drain.หนาวแล้ว! กรมอุตุนิยมวิทยา ประกาศ ประเ