01 / 4 · Practical Engineering
The drain relieves the uplift on the base by creating an area of low pressure below the dam.
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Second, they relieve uplift pressure by removing the water.
It's more It's so important more than ever to uplift these communities of people who are going through so much and who are being persecuted so much.
Wind can exert tremendous and rapidly-fluctuating pressure on a large structure pushing it horizontally and even creating uplift like the wing of an airplane.
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