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Large Xblocs (8.0 m 3 or 280 cu ft) on a trial placement area. An Xbloc is a wave-dissipating concrete block (or "armour unit") designed to protect shores, harbour walls, seawalls, breakwaters and other coastal structures from the direct impact of incoming waves.
A pinhole occluder is an opaque disk with one or more small holes through it, used by ophthalmologists, orthoptists and optometrists to test visual acuity. The occluder is a simple way to focus light, as in a pinhole camera, temporarily removing the effects of refractive errors such as myopia. Because light passes only through the center of the ...
The minimum recommended overall length of an EMAS installation is 600 feet (180 m), of which at least 400 feet (120 m) is to consist of the frangible material. [7] As of April 2019, ESCO's EMAS is installed at 112 runway ends at 68 airports in the United States, with plans to install three EMAS systems at two additional U.S. airports. [8]
A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Steel- reinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving ( see below ).
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AAC blocks on a residential house construction site in Russia. AAC is a concrete-based material used for both exterior and interior construction. [16] One of its advantages is quick and easy installation because the material can be routed, sanded, or cut to size on-site using a hand saw and standard power tools with carbon steel cutters. [2]
Freshman Kasparas Jakucionis scored a season-high 23 points, Tomislav Ivisic had 21 points and 10 rebounds and Illinois beat No. 19 Arkansas 90-77 on Thursday in the Thanksgiving Hoops Showcase.
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