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Lissabon, PortugalSailers MemorialBuilt in 1960 for the 500th aniversary of the Portugese Discoverers Building Material:Cover of Limestone Tiles Type of Soiling: Moss, Sand Crepe, Graffiti, Plaster Blistering Cleaning Equipment: Facade Clean Trailer (FCT) 0.1-0.3 mm Glass Sand Air with 3.5bar or 51psi pressure Duration: May–June 1990 |
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