| 摘要 |
Apparatus for isolating from a body of water a predetermined bottom area and a volume of water or other liquid extending above the bottom area up to the surface of the body of water, comprising a flexible wall member with a flexible and conforming base section formed on its lowermost edge. The base section is adapted to be filled selectively from the surface of the body of water to anchor the wall member to the bottom. A float member is secured to the uppermost section of the wall member to keep the wall member floating above the surface of the body of water.
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