perforated breakwater

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Offshore concrete structure — Offshore concrete structures have been in use successfully for about 30 years. They serve the same purpose as their steel counterparts in the oil and gas production and storage. The first concrete oil platform has been installed in the North Sea… … Wikipedia
harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… … Universalium
Spandau Prison — was a prison situated in the borough of Spandau in western Berlin, constructed in 1876 and demolished in 1987 after the death of its last prisoner, Rudolf Hess, to prevent it from becoming a neo Nazi shrine. The prison was near, though not part… … Wikipedia
Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… … Wikipedia

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