Walls of sand bags, flood prevention, water can prevent the inflow was being blocked, but there are also aspects that are aligned with the walls of water-side 2 commercial buildings can also be passed to ooze slightly, but if you modify by adding a waterproof sheet, close both sides and use sand instead of water because water has more weight in sand and can be packed to move, it will be able to solve the problems which result from the absorption of water in the experiment are 80% of the performance.
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