| 摘要 |
A modular unit for use in the construction of floating covers used in horizontal or vertical liquid storage tanks. The unit comprises a core of cellular plastic foam 30 and a covering 32, which encloses the core forming a seal. The covering comprises a layer of electrically conductive, flexible metal 34 and at least one plastic layer 36, 38. An outer plastic layer 36 will counter metal corrosion. <IMAGE>
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