THE BASIC PRINCIPLES OF ท่อน้ำฝน

Use picket stakes and Mason’s line or chalk line to produce a square or rectangular condition round the marked region. Make certain the formwork is level and protected. While developing the formwork, make allowance for the slope toward the middle of the drain.ซื้อวันนี้ส่งวันนี้ จำหน่ายโดย