ABOUT ระบบระบายน้ำฝน

Use picket stakes and Mason’s line or chalk line to create a sq. or rectangular condition throughout the marked place. Be sure the formwork is stage and safe. Whilst building the formwork, make allowance for the slope in the direction of the center with the drain.สมัครเป็นผู้ขาย ติดต่อและร้อ�