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Wave-dissipating concrete block

From Wikipedia, the free encyclopedia

A wave-dissipating concrete block is a naturally or manually interlocking concrete structure designed and employed to minimize the effects of wave action upon shores and shoreline structures, such as quays and jettys.

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Tetrapods used to protect a seawall
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Large interlocked Xblocs (8.0 m3 or 280 cu ft) in a trial placement

Examples include such proprietary designs as the Tetrapod, Accropode, Xbloc, KOLOS, and Dolos.