grooved grating

Игры ⚽ Нужен реферат?

Fly system — Fly loft of the Theater Bielefeld in Germany A fly system, flying system or theatrical rigging system, is a system of lines (e.g. ropes), blocks (pulleys), counterweights and related devices within a theatre that enable a stage crew to quickly,… … Wikipedia
Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after … Wikipedia
Thomas Ralph Merton — Sir Thomas Ralph Merton KBE, DSc, FRS (1888 ndash;1969) was an English physicist, inventor and art collector. He is particularly noted for his work on spectroscopy and diffraction gratings.Early life and educationBorn in Wimbledon, Surrey, Thomas … Wikipedia
Hawthorne Bridge — Infobox Bridge bridge name=Hawthorne Bridge official name=Hawthorne Bridge carries=vehicles, pedestrians, cyclists crosses=Willamette River locale=Portland, Oregon maint=Multnomah County design=truss with a vertical lift span mainspan=224 ft (68… … Wikipedia
Noise mitigation — is a set of strategies to reduce noise pollution. The main areas of noise mitigation or abatement are: transportation noise control, architectural design, and occupational noise control. Roadway noise and aircraft noise are the most pervasive… … Wikipedia

Словари и энциклопедии на Академике