A retention barrier system comprises a flexible laminate of a thin paper sheet and thin aluminum sheet in a rectangular configuration. The laminate has a leading edge and a parallel trailing edge and side edges between the leading and trailing edges. A plurality of flexible rods are positioned across, and coupled to, the laminate from side edge to side edge and spaced from each other along the length of the laminate.

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> Bitumen emulsions, method for obtaining them and compositions containing same

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